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input question: I read this background article the other day: If a solution has a higher concentration of hydronium ions than pure water, it has a pH lower than 7. A solution with a pH lower than 7 is called an acid . As the hydronium ion concentration increases, the pH value decreases. Therefore, the more acidic a sol... | liquid | 9 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: During late adulthood, the risk of developing diseases such as cardiovascular diseases and cancer continues to rise. Most people also have a decline in strength and stamina. Their senses may start failing, and their reflex time typically increases. Their immune system also ... | Iraq | 1 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: Marine pollution is a generic term for the entry into the ocean of potentially hazardous chemicals or particles. The biggest culprits are rivers and with them many agriculture fertilizer chemicals as well as livestock and human waste. The excess of oxygen-depleting chemi... | Hill | 2 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: As you can see in Figure above , solid and liquid solutes generally become more soluble as the temperature increases. This is true for solvents other than water as well. This effect varies quite a bit by substance. For example, the solubility of KNO 3 has a very s... | Molly's town | 3 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: Sometimes muscles and tendons get injured when a person starts doing an activity before they have warmed up properly. A warm up is a slow increase in the intensity of a physical activity that prepares muscles for an activity. Warming up i... | scenario D | 5 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: The classical explanation of gravity is that a force of attraction acts at a distance between two objects and the magnitude of the force is directly proportional to each of the masses and inversely proportional to the square of the distan... | Red | 5 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: Soil is well developed in the forest as suggested by the thick humus layers, rich diversity of large trees and animals that live there. In forests, precipitation exceeds evapotranspiration which results in an excess of water that percolates downward through ... | more | 9 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Fish reproduce sexually. They lay eggs that can be fertilized either inside or outside of the body. In most fish, the eggs develop outside of the mother's body. In the majority of these species, fertilization also takes place outside the mother's body. The male and female f... | slower | 1 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: The frequency of sound waves is measured in hertz (Hz), or the number of waves that pass a fixed point in a second. Human beings can normally hear sounds with a frequency between about 20 Hz and 20,000 Hz. Sounds with frequencies below 20 hertz are called infrasound . Sound... | Ans: not decline | 0 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: All machines make work easier, but they don’t increase the amount of work that is done. You can never get more work out of a machine than you put into it. In fact, a machine always does less work on an object than the user does on the machine. T... | Two | 8 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Geologists study earthquake waves to “see” Earth's interior. Waves of energy radiate out from an earthquake’s focus. These waves are called seismic waves ( Figure below ). Seismic waves go different speeds through different materials. They change speed when they go from one... | case B | 1 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: Lake-effect snow is produced during cooler atmospheric conditions when a cold air mass moves across long expanses of warmer lake water, warming the lower layer of air which picks up water vapor from the lake, rises up through the colder air above, freeze... | Sam | 6 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: The Figure below shows decibel levels of several different sounds. As decibel levels get higher, sound waves have greater intensity and sounds are louder. For every 10-decibel increase in the intensity of sound, loudness is 10 times greater. Therefore, a 30-... | Port | 9 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: Sand mining is a direct cause of erosion, and impacts the local wildlife.[2] Various animals depend on sandy beaches for nesting clutches, and mining has led to the near extinction of gharials (a species of crocodile) in India. Disturbance of underwater ... | ginger | 6 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: As a cell grows, its volume increases more quickly than its surface area. If a cell was to get very large, the small surface area would not allow enough nutrients to enter the cell quickly enough for the cell’s needs. This idea is explained in Figure below . However, large ... | Ans: increase | 0 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Temperature is a measure of the average kinetic energy of the particles in matter. In everyday usage, temperature indicates a measure of how hot or cold an object is. Temperature is an important parameter in chemistry. When a substance changes from solid to liquid, it ... | most likely lose | 4 | P3 | ropes_read_background_situation | fs_noopt |
Problem: I read this background article the other day: Gibberellins are hormones that cause the plant to grow. When gibberellins are applied to plants by scientists, the stems grow longer. Some gardeners or horticulture scientists add gibberellins to increase the growth of plants. Dwarf plants (small plants), on the ot... | Adam | 7 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: Human beings invented agriculture about 10,000 years ago. This provided a bigger, more dependable food supply. It also allowed people to settle down in villages and cities for the first time. Birth rates went up because there was more food and s... | wave A | 8 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Chlamydia may cause a burning feeling during urination. It may also cause a discharge (leaking of fluids) from the vagina or penis. But in many cases it causes no symptoms. As a result, people do not know they are infected, so they don’t go to the doctor for help. If chlamy... | Pete | 1 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: The Gaia hypothesis states that the biosphere is its own living organism. The hypothesis suggests that the Earth is self-regulating and tends to achieve a stable state, known as homeostasis . For example the composition of our atmosphere stays fairly con... | Dee | 6 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: The intentional cultivation of arthropods and other small animals for human food, referred to as minilivestock, is now emerging in animal husbandry as an ecologically sound concept. However, the greatest contribution of arthropods to human food supply is by ... | Elaine | 9 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: The water level is seasonal, being lowered by about 10 feet (3.0 m) over the winter. The reservoir fills in the spring from snow melt and underground springs. The lake is usually at full level by late spring, but in the occasional years of low snow melt ... | group Beta | 6 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: Because of human activities, there is more carbon dioxide in the atmosphere today than in the past hundreds of thousands of years. Burning fossil fuels and has released great quantities of carbon dioxide into the atmosphere. Cutting fores... | lower | 5 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Air pollution can also indirectly cause other health issues and even deaths. Air pollutants can cause an increase in cancer including lung cancer, eye problems, and other conditions. For example, using certain chemicals on farms, such as the insecticide DDT (dichlorodipheny... | Paul | 1 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: Soil formation, or pedogenesis, is the combined effect of physical, chemical, biological and anthropogenic processes working on soil parent material. Soil is said to be formed when organic matter has accumulated and colloids are washed downward, leaving ... | Bahrain | 6 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: Unfortunately, the layer of good ozone is being destroyed by air pollution. The chief culprits are chlorine and bromine gases. They are released in aerosol sprays, coolants, and other products. Loss of ozone has created an ozone hole over Antarc... | time A | 8 | P3 | ropes_read_background_situation | fs_noopt |
Problem: I read this background article the other day: Sand mining is a direct cause of erosion, and impacts the local wildlife.[2] Various animals depend on sandy beaches for nesting clutches, and mining has led to the near extinction of gharials (a species of crocodile) in India. Disturbance of underwater and coastal... | yes | 7 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: Generally, nearsightedness first occurs in school-age children. There is some evidence that myopia is inherited. If one or both of your parents need glasses, there is an increased chance that you will too. Individuals who spend a lot of time reading, wor... | point C | 6 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: Many different chemical substances cause cancer. Dozens of chemicals in tobacco smoke, including nicotine, have been shown to cause cancer ( Figure below ). In fact, tobacco smoke is one of the main sources of chemical carcinogens. Smoking tobacco increases ... | Africa | 9 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: As a cell grows, its volume increases more quickly than its surface area. If a cell was to get very large, the small surface area would not allow enough nutrients to enter the cell quickly enough for the cell’s needs. This idea is explained in Figure below . Howev... | higher | 3 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Because the Earth's axis is tilted relative to its orbital plane, sunlight is incident at different angles at different times of the year. In June the Northern Hemisphere is tilted towards the sun, so at any given Northern Hemisphere latitude sunlight falls more directly on... | Ans: shaken | 0 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. Magnetism is due to the movement of electrons within atoms of matter. When electrons spin around the nucleus of an atom, it causes the atom to become a tiny magnet, with north and ... | unfavorable | 2 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: Greenhouse Effect: The solar energy reaching the surface of the Earth is concentrated in short wavelengths, which can easily penetrate the greenhouse gases, such as carbon dioxide and methane. The Earth, however, is cooler than the sun and it radiates its he... | less | 9 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: Temperature is a measure of the average kinetic energy of the particles in matter. In everyday usage, temperature indicates a measure of how hot or cold an object is. Temperature is an important parameter in chemistry. When a substance changes from solid... | Sue | 6 | P3 | ropes_read_background_situation | fs_noopt |
Problem: I read this background article the other day: Habitat destruction has played a key role in extinctions, especially in relation to tropical forest destruction. Factors contributing to habitat loss include: overconsumption, overpopulation, land use change, deforestation, pollution (air pollution, water pollution... | Listy | 7 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: When humans dig up and use fossil fuels, we have an impact on the carbon cycle ( Figure below ). This carbon is not recycled until it is used by humans. The burning of fossil fuels releases more carbon dioxide into the atmosphere than is used by photosynthesis. So, there is... | Ans: Jeremy's | 0 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: Beginning in September 2012, the U.S. Food and Drug Administration will require larger, more prominent cigarette health warnings on all cigarette packaging and advertisements in the United States. These warnings are a significant advancement in communicating the dangers ... | comp A | 2 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: Millions of people in the world jog for exercise. For the most part, jogging can be a healthy way to stay fit. However, problems can also develop for those who jog in the heat. Excessive sweating can lead to electrolyte loss that could be life-threatening. Early symptoms... | more | 2 | P3 | ropes_read_background_situation | fs_noopt |
Problem: I read this background article the other day: Noble gases are also used to fill the glass tubes of lighted signs like the one in the Figure below . Although noble gases are chemically nonreactive, their electrons can be energized by sending an electric current through them. When this happens, the electrons jum... | higher | 7 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Protozoa generally feed by engulfing and digesting other organisms. As consumers, they have various roles in food chains and webs. Some are predators. They prey upon other single-celled organisms, such as bacteria. In fact, protozoa predators keep many bacterial popula... | group A | 4 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: In common everyday speech, speed of sound refers to the speed of sound waves in air. However, the speed of sound varies from substance to substance: sound travels most slowly in gases; it travels faster in liquids; and faster still in solids. For example, (as noted above... | Pete | 2 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: While the Grants were on the Galápagos, a drought occurred. As a result, fewer seeds were available for finches to eat. Birds with smaller beaks could crack open and eat only the smaller seeds. Birds with bigger beaks could crack and eat seeds of all siz... | Jeffrey's | 6 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: Naturally occurring uranium is composed almost entirely of two isotopes, uranium-238 (99%) and uranium-235 (1%). It is the uranium-235 that is fissionable (will undergo fission) and therefore, this is the uranium isotope than can be used ... | same | 5 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: Law enforcement officers are often unfamiliar with information technology, and so lack the skills and interest in pursuing attackers. There are also budgetary constraints. It has been argued that the high cost of technology, such as DNA testing, and impr... | Barry | 6 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: Candied fruit, also known as crystallized fruit or glacé fruit, has existed since the 14th century. Whole fruit, smaller pieces of fruit, or pieces of peel, are placed in heated sugar syrup, which absorbs the moisture from within the fruit and eventually pre... | Mars | 9 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: A period of very low rainfall occurred while the Grants were on the islands. The drought resulted in fewer seeds for the finches to eat. Birds with smaller beaks could eat only the smaller seeds. Birds with bigger beaks were better off. They could eat seeds of all sizes.... | Greg | 2 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: Reptiles are a class of animals comprising turtles, tuataras, lizards, snakes and crocodiles. They are tetrapods, but the snakes and a few species of lizard either have no limbs or their limbs are much reduced in size. Their bones are better ossified and their ske... | less | 3 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Fish mortality is a parameter used in fisheries population dynamics to account for the loss of fish in a fish stock through death. The mortality can be divided into two types: Natural mortality: the removal of fish from the stock due to causes not associated with fish... | Patty | 4 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Sand mining is a direct cause of erosion, and impacts the local wildlife.[2] Various animals depend on sandy beaches for nesting clutches, and mining has led to the near extinction of gharials (a species of crocodile) in India. Disturbance of underwater and coastal san... | Bill | 4 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: As time passes, the number of HIV copies keeps increasing, while the number of helper T cells keeps decreasing. The graph in Figure below shows how the number of T cells typically declines over a period of many years following the initial HIV infection. As the number of T c... | Ans: Dan | 0 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: Organisms can use different strategies to increase their reproduction rate. Altricial organisms are helpless at birth, and their parents give them a lot of care. This care is often seen in bird species. ( Figure below ). Altricial birds are usua... | Ben | 8 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Apex predators affect prey species' population dynamics and populations of other predators, both in aquatic and in terrestrial ecosystems. Non-native predatory fish, for instance, have sometimes devastated formerly dominant predators. A lake manipulation study found th... | Ann | 4 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: A large log placed in a fire will burn relatively slowly. If the same mass of wood were added to the fire in the form of small twigs, they would burn much more quickly. This is because the twigs provide a greater surface area than the log does. An increase in the surface ar... | Jolt | 1 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: For an inclined plane, the input distance is the length of the sloping surface, and the output distance is the maximum height of the inclined plane. This was illustrated in Figure above . Because the sloping surface is always greater than the height of the inclined plane... | Eastern | 2 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: Sometimes muscles and tendons get injured when a person starts doing an activity before they have warmed up properly. A warm up is a slow increase in the intensity of a physical activity that prepares muscles for an activity. Warming up increase... | decrease | 8 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: Wildfire intensity increases during daytime hours. For example, burn rates of smoldering logs are up to five times greater during the day because of lower humidity, increased temperatures, and increased wind speeds. Sunlight warms the ground dur... | Bob | 8 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: As time passes, the number of HIV copies keeps increasing, while the number of helper T cells keeps decreasing. The graph in Figure below shows how the number of T cells typically declines over a period of many years following the initial HIV infection. ... | smaller | 6 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: Charging an object by touching it with another charged object is called charging by conduction. By bringing a charged object into contact with an uncharged object, some electrons will migrate to even out the charge on both objects. Chargi... | society A | 5 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: When you go to the dentist to get a tooth pulled, you really don’t want to feel any pain. The dentist injects an anesthetic into your gum and it eventually becomes numb. One theory as to why anesthetics work deals with the movement of ions acros... | beaker A | 8 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: The intentional cultivation of arthropods and other small animals for human food, referred to as minilivestock, is now emerging in animal husbandry as an ecologically sound concept. However, the greatest contribution of arthropods to human food supply is by pollination... | Nate | 4 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: Wildfire intensity increases during daytime hours. For example, burn rates of smoldering logs are up to five times greater during the day because of lower humidity, increased temperatures, and increased wind speeds. Sunlight warms the gro... | Hop | 5 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: In nature, when the population size is small, there is usually plenty of food and other resources for each individual. When there is plenty of food and other resources, organisms can easily reproduce, so the birth rate is high. As the population increases, the food sup... | team B | 4 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: Old age begins in the mid-60s and lasts until the end of life. Most people over 65 have retired from work, freeing up their time for hobbies, grandchildren, and other interests. Stamina, strength, reflex time, and the senses all decline d... | Brunt | 5 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Located mostly in the Arctic north polar region in the middle of the Northern Hemisphere, the Arctic Ocean is almost completely surrounded by Eurasia and North America. It is partly covered by sea ice throughout the year and almost completely in winter. The Arctic Ocea... | Gas A | 4 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: Baker's yeast is the common name for the strains of yeast commonly used in baking bread and bakery products, serving as a leavening agent which causes the bread to rise (expand and become lighter and softer) by converting the fermentable sugars present in th... | fresh oranges | 9 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: As a cell grows, its volume increases more quickly than its surface area. If a cell was to get very large, the small surface area would not allow enough nutrients to enter the cell quickly enough for the cell’s needs. This idea is explained in Figure below . However, lar... | the soup | 2 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Rainfall in an area is important because it influences the rate of weathering. More rain means that more rainwater passes through the soil. The rainwater reacts chemically with the particles. The top layers of soil are in contact with the freshest water, so reactions are gr... | era A | 1 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: One reason radiation is dangerous is that it can’t be detected with the senses. You normally can’t see it, smell it, hear it, or feel it. Fortunately, there are devices such as Geiger counters that can detect radiation. A Geiger counter, like the one in Figure below , ... | Village A | 4 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". This occurs in a type of glacier called a "valley glacier". As a glacier moves down a va... | Ans: Dean | 0 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: Old age begins in the mid-60s and lasts until the end of life. Most people over 65 have retired from work, freeing up their time for hobbies, grandchildren, and other interests. Stamina, strength, reflex time, and the senses all decline during old age, and the num... | Kate | 3 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Another example of incomplete dominance is with sickle cell anemia, a disease in which a blood protein called hemoglobin is produced incorrectly. This causes the red blood cells to have a sickle shape, making it difficult for these misshapen cells to pass through the s... | Plum | 4 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: The major zones in river ecosystems are determined by the river bed's gradient or by the velocity of the current. Faster moving turbulent water typically contains greater concentrations of dissolved oxygen, which supports greater biodiver... | Low | 5 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: Genetically modified organisms (GMO) are organisms whose genetic material has been altered by genetic engineering techniques generally known as recombinant DNA technology. Genetic engineering has expanded the genes available to breeders to utilize in creatin... | Dan | 9 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: The theory of plate tectonics demonstrates that the continents of the Earth are moving across the surface at the rate of a few centimeters per year. This is expected to continue, causing the plates to relocate and collide. Continental drift is facilitated by two factor... | Brown | 4 | P3 | ropes_read_background_situation | fs_noopt |
input: Please answer the following: I read this background article the other day: Clouds on Earth are made of water vapor. Venus's clouds are a lot less pleasant. They are made of carbon dioxide, sulfur dioxide and large amounts of corrosive sulfuric acid! The atmosphere of Venus is so thick that the pressure on the su... | Ned | 5 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: Charging an object by touching it with another charged object is called charging by conduction. By bringing a charged object into contact with an uncharged object, some electrons will migrate to even out the charge on both objects. Charging by conduction gives the previo... | test B | 2 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: There must be more to this story than just gas exchange with the environment. To begin to appreciate the role of oxygen inside your body, think about when your breathing rate increases: climbing a steep slope, running a race, or skating a shift in a hockey game. Respir... | Ned | 4 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: Submarine volcanoes are common features of the ocean floor. In shallow water, active volcanoes disclose their presence by blasting steam and rocky debris high above the ocean's surface. In the ocean's deep, the tremendous weight of the water above prevents the explosive ... | Seattle | 2 | P3 | ropes_read_background_situation | fs_noopt |
Q: I read this background article the other day: Wildfire intensity increases during daytime hours. For example, burn rates of smoldering logs are up to five times greater during the day because of lower humidity, increased temperatures, and increased wind speeds. Sunlight warms the ground during the day and causes air... | Bahrain | 2 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: It would be very unadvisable to place a can of soup over a campfire without venting the can. As the can heats up, it may explode. The kinetic-molecular theory explains why. The air inside the rigid can of soup is given more kinetic energy by the heat coming from the ca... | Thorn | 4 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: It would be very unadvisable to place a can of soup over a campfire without venting the can. As the can heats up, it may explode. The kinetic-molecular theory explains why. The air inside the rigid can of soup is given more kinetic energy by the heat coming from the ca... | Brook | 4 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Electrons can be removed from some objects using friction, simply by rubbing one substance against another substance. There are many examples of objects becoming charged by friction, including a rubber comb through hair, and a balloon on a sweater. In both these instances, ... | Ans: case B | 0 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: Human beings invented agriculture about 10,000 years ago. This provided a bigger, more dependable food supply. It also allowed people to settle down in villages and cities for the first time. Birth rates went up because there was more food and settled life had oth... | Jeb | 3 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Many people enjoy riding in hot air balloons. Some use them for romantic picnics and marriage proposals. Others race in competitions. Being above the earth gives a whole new perspective on the world around us. As the beginning of a hot air balloon ride, the balloon is flat ... | less | 1 | P3 | ropes_read_background_situation | fs_noopt |
Problem: I read this background article the other day: Recall that air pollution is due to chemical substances and particles released into the air mainly by human actions. When most people think of air pollution, they think of the pollution outdoors. But it is just as easy to have indoor air pollution. Your home or sch... | group B | 7 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: Almost all earthquakes occur at plate boundaries. All types of plate boundaries have earthquakes. Convection within the Earth causes the plates to move. As the plates move, stresses build. When the stresses build too much, the rocks break. The break releases the e... | Boncho | 3 | P3 | ropes_read_background_situation | fs_noopt |
Please answer this: I read this background article the other day: The theory of plate tectonics demonstrates that the continents of the Earth are moving across the surface at the rate of a few centimeters per year. This is expected to continue, causing the plates to relocate and collide. Continental drift is facilitate... | house B | 6 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: Although some lipids in the diet are essential, excess dietary lipids can be harmful. Because lipids are very high in energy, eating too many may lead to unhealthy weight gain. A high-fat diet may also increase lipid levels in the blood. This, in turn, can increas... | Dan | 3 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: When wind waves approach to coast area from deep water, the waves change their heights and lengths. The wave height becomes higher and the wavelength becomes shorter as the wave velocity is slowed when ocean waves approach to the shore. If the water depth is sufficiently sh... | Ans: Andy | 0 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Hepatitis viruses can develop into a chronic viral infection that leads to liver cancer. Infection by human T-lymphotropic virus can lead to tropical spastic paraparesis and adult T-cell leukaemia. Human papillomaviruses are an established cause of cancers of cervix, skin, ... | Ans: more | 0 | P3 | ropes_read_background_situation | fs_noopt |
Problem: Given the question: I read this background article the other day: During the Cold War, the Arctic became a place where the United States, Canada, and the Soviet Union performed significant research that has been essential to the study of climate change in recent years. A major reason why research in the Arctic... | less | 8 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: One reason radiation is dangerous is that it can’t be detected with the senses. You normally can’t see it, smell it, hear it, or feel it. Fortunately, there are devices such as Geiger counters that can detect radiation. A Geiger counter, like the one in Figure bel... | Robert | 3 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: The primary role of red blood cells in the circulatory system is to transport oxygen to the tissues. The actual carrier of oxygen molecules is the protein hemoglobin, which binds to the oxygen and moves it throughout the body, releasing it in areas where the concentrat... | Alpha | 4 | P3 | ropes_read_background_situation | fs_noopt |
[Q]: I read this background article the other day: Mantle melting can come about three ways: (1) when the temperature rises, (2) if the pressure lowers (which lowers the melting point), and (3) if water is added, which lowers the melting point. Two of these (1 and 3) might explain why there are volcanoes at convergent ... | Mary | 4 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: When the temperature of reactants is higher, the rate of the reaction is faster. At higher temperatures, particles of reactants have more energy, so they move faster. As a result, they are more likely to bump into one another and to collide with greater force. For... | Barb | 3 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: One reason radiation is dangerous is that it can’t be detected with the senses. You normally can’t see it, smell it, hear it, or feel it. Fortunately, there are devices such as Geiger counters that can detect radiation. A Geiger counter, like the one in Figu... | Lake's | 9 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: In the U.S., the majority of electricity is produced by burning coal or other fossil fuels. This causes air pollution, acid rain, and global warming. Fossil fuels are also limited and may eventually run out. Like fossil fuels, radioactive elements are limite... | Kim | 9 | P3 | ropes_read_background_situation | fs_noopt |
Question: I read this background article the other day: Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that... | more | 3 | P3 | ropes_read_background_situation | fs_noopt |
input question: I read this background article the other day: Clouds on Earth are made of water vapor. Venus's clouds are a lot less pleasant. They are made of carbon dioxide, sulfur dioxide and large amounts of corrosive sulfuric acid! The atmosphere of Venus is so thick that the pressure on the surface of Venus is ve... | Jessica | 9 | P3 | ropes_read_background_situation | fs_noopt |
I read this background article the other day: Fish reproduce sexually. They lay eggs that can be fertilized either inside or outside of the body. In most fish, the eggs develop outside of the mother's body. In the majority of these species, fertilization also takes place outside the mother's body. The male and female f... | Chicken A | 1 | P3 | ropes_read_background_situation | fs_noopt |
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