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Question: One way that students can help conserve natural resources at school is by
Answer: recycling aluminum cans. |
Question: The Grand Canyon is an example of
Answer: erosion. |
Question: Humans cannot survive without clean, fresh water. Reservoirs of liquid water vary, but all water spends time as a gas in the atmosphere. What is the source of most of the water in the atmosphere?
Answer: oceans |
Question: When a frying pan is placed on an electric stove top, heat energy is transferred from the burner to the pan by
Answer: conduction. |
Question: What happens when water flows over a rock for a long period of time?
Answer: erosion |
Question: During winter, the white fur of an arctic fox blends in with the snow. This adaptation is called
Answer: camouflage |
Question: How has the invention of the personal computer helped people the most?
Answer: by increasing communication |
Question: Humans depend on which natural resource from the environment?
Answer: water |
Question: The danger posed to fish in an aquarium by an overpopulation of bacteria caused by an algal bloom is most likely a
Answer: reduction in oxygen levels. |
Question: Natural processes shape the surface of Earth. Most canyons are formed by ___.
Answer: moving water |
Question: What is the best way for a student to describe the results of an experiment?
Answer: in a written report |
Question: Which of the following is a living component of a desert in California?
Answer: horned lizard |
Question: Scientists wonder how the Egyptian pyramids were built. They think that the huge blocks of stone may have been put into place by pushing them up a sloping pathway. The pathway is which type of simple machine?
Answer: inclined plane |
Question: Magnesium strips are long, thin strips that are gray and shiny. Which action will lead to a chemical change of magnesium strips?
Answer: burning them with a candle |
Question: Which involves the greatest variety of cell types?
Answer: an organism |
Question: Snapping a rubber band most likely produces which type of energy?
Answer: sound |
Question: People can help keep a forest a good place for birds to live by
Answer: preventing too many trees from being cut down |
Question: Randall is picking lettuce from his garden for dinner. His mother told him to leave some leaves on each plant. Why is it important to leave some leaves on the plant?
Answer: Leaves help the plant make food. |
Question: A negatively-charged ion has
Answer: more electrons than protons. |
Question: Which statement explains what will most likely happen to the hydrosphere in an area where air temperatures increase?
Answer: Evaporation will increase. |
Question: Which energy source is considered nonrenewable?
Answer: oil |
Question: When buried sediments are subjected to pressure, the mineral grains are squeezed together. What is the result of this action?
Answer: new rock is formed |
Question: What is the primary source of energy for organisms from a beach ecosystem?
Answer: the Sun |
Question: Before rock can become soil, it must undergo certain processes. One process in the formation of soil involves plants. How can plants chemically change rocks into soil?
Answer: They weather rocks with acid. |
Question: Which is the best way a science student can help to maintain laboratory equipment?
Answer: clean up all materials and workspaces after investigations |
Question: Which of the following statements best explains why stars appear to move across Earth's sky each night?
Answer: Earth rotates on its axis. |
Question: Researchers are developing new types of crop plants with desirable characteristics such as disease resistance and drought tolerance. Crossing plants so that the next generation will express desirable traits is best described as
Answer: selective breeding. |
Question: In May 2007, wildfires burned more than 350 square miles of habitat in Florida and Georgia. Intense fires like this one can temporarily remove nitrogen, phosphorus, and potassium in area soil. What most likely happens in the burned areas until organic decay replenishes the lost nutrients?
Answer: The carrying capacity of the soil for plant growth is reduced. |
Question: Helen is preparing a presentation about objects in the solar system. She includes facts about the order of the planets and their distances from the Sun. Which statement could she include in an accurate presentation?
Answer: Earth is one astronomical unit from the Sun. |
Question: Farmers in the 1800s used axes to clear trees from farmland. Now, farmers use chainsaws to clear the trees. How do chainsaws most likely help farmers?
Answer: Farmers can remove more trees in less time. |
Question: What can a moving magnet in a coil of copper wire cause?
Answer: an electric current |
Question: A researcher determines a cell has a flexible cell wall composed of peptidoglycan. This observation narrows possible classifications of the cell to which taxonomic group?
Answer: bacteria |
Question: A student conducts an investigation using mold spores. In one part of the investigation, he needs to closely examine a spore sample. Which piece of equipment does the student need to use to keep mold spores from entering his respiratory system?
Answer: breathing mask |
Question: Vultures are scavengers that most likely help ecosystems by quickly consuming dead organisms and
Answer: slowing the spread of disease. |
Question: What is the process called when an acid and a base combine to produce water and salt?
Answer: neutralization |
Question: Amylase is a chemical that decomposes starch into maltose and dextrin. Which best describes the role of amylase in the human body?
Answer: as an enzyme that aids in digestion |
Question: Sound waves can pass through all of these except
Answer: a vacuum. |
Question: Why is it important to repeat an experiment several times?
Answer: to determine if the results are similar |
Question: Which force causes a marble to sink to the bottom of a glass of water?
Answer: gravity |
Question: A mosquito is a type of flying insect that lays eggs in puddles or small pools of water. When larvae develop from eggs, the larvae come to the surface to get air through special breathing tubes. After one to two weeks, the larvae become pupae and then turn into adults. How would a dry summer affect a mosquito population?
Answer: The adult mosquitoes would have fewer places to lay eggs. |
Question: NASA's Kepler Mission has collected information about main-sequence stars with characteristics similar to the Sun. What is the most common color of these stars?
Answer: yellow |
Question: A fever is a response to a disease-causing agent infecting the body. Raising one's body temperature changes the shape of enzymes in the agent so it cannot reproduce. Which statement best describes a fever?
Answer: A fever is an internal response to an internal stimulus. |
Question: Two people are pushing a car. One person is pushing with a force of 450 N and the other person is pushing with a force of 300 N. What information is needed to determine the net force applied to the car by the people?
Answer: the direction of the forces |
Question: A student proposes the rate of increase in a plant's mass will be proportional to the length of light exposure per day when all other variables are constant. How should this proposal be classified?
Answer: as a hypothesis |
Question: Approximately how many times will Earth rotate during one revolution around the Sun?
Answer: 365 |
Question: A shiny aluminum screen can be placed on the windshield of a parked car. This screen helps to keep the car cool because it
Answer: reflects the sunlight |
Question: Which property of an object can be described as smooth?
Answer: texture |
Question: During photosynthesis, plants absorb light energy from the Sun and convert it into chemical energy in the form of glucose. Which compounds combine in the presence of sunlight to form glucose?
Answer: carbon dioxide (CO2) and water (H2O) |
Question: A researcher is viewing a cell that has cell walls. To best narrow down the taxonomic group from which the cell belongs, which question should a researcher ask?
Answer: What is the composition of the cell walls? |
Question: Which of the following best explains what will occur when a population grows larger than the carrying capacity of its environment?
Answer: The death rate will increase. |
Question: Oceans have many layers of sediments. These layers become compacted when they are buried under other layers of sediments. Which is most likely to happen to the deepest layers?
Answer: They will recrystallize into new rock. |
Question: The first microscopes were built in the 1600s. Microscopes have improved since then, but still perform the same job. How do microscopes most help scientists?
Answer: They make small objects easier to see. |
Question: What do plants take from the air that helps them make food?
Answer: carbon dioxide |
Question: When a person sees something, what carries the message from the eyes to the brain?
Answer: nerves |
Question: Which of the following is an abiotic factor that can influence the quantity of fish a pond can support?
Answer: quality of water |
Question: The islands in the mid-Pacific Ocean region were formed by
Answer: volcanic activity. |
Question: Which term identifies a single unit of hereditary information?
Answer: gene |
Question: A mother hen clucks loudly when danger is near and her chicks quickly gather around her. Which sense helps the chicks receive this warning about danger from their mother?
Answer: sound |
Question: Newly hatched turtles are easy prey for other animals. What is an important ability turtles have for better survival of their offspring?
Answer: to lay hundreds of eggs so a few will survive |
Question: Mr. Mendoza's class studied different body systems. What is an important function of the circulatory system?
Answer: carrying oxygen to cells |
Question: Which example shows a new substance being formed?
Answer: a candle burning |
Question: What do all mammals have in common that distinguishes them from birds?
Answer: fur |
Question: Grooves running down the sides of a riverbank are most likely caused by
Answer: rainwater. |
Question: Which of the following best describes a mineral?
Answer: a solid natural material with a crystal structure |
Question: Plankton are tiny ocean organisms. The role of one type of plankton is to use the energy from the Sun to produce food that other animals eat. Which organism has the same role in the ocean as this type of plankton?
Answer: seaweed |
Question: How many times does the Moon rotate on its axis during a lunar month?
Answer: one |
Question: Changes to abiotic factors in an environment can impact biotic factors. Which statement is the BEST example of this situation?
Answer: Drought conditions increase competition among consumers. |
Question: There are several different types of rock. Each type of rock is formed under different conditions. How are sedimentary rocks, such as shale and sandstone, formed?
Answer: Particles are compressed into layers. |
Question: Which disease is correctly paired with the cause of the disease?
Answer: athlete's foot - fungi |
Question: Unequal distribution of the hormone auxin in plants helps to regulate the direction of plant growth. Which of the following is accomplished by plants in regulating the distribution of auxin?
Answer: responding to the environment |
Question: Ten people became sick with the flu after attending a school dance. What is the scenario that could best explain how the people got sick?
Answer: contact with an infected person |
Question: One way to protect against food poisoning is to
Answer: cook food to proper temperatures. |
Question: Which statement is a MAJOR mistake in the experimental design?
Answer: A control group was not used. |
Question: Which effect do rapidly cooling temperatures have on the water cycle?
Answer: Water vapor condenses into droplets. |
Question: A researcher found shark fossils on top of a mountain. This evidence suggests which of the following about this region?
Answer: It was once covered by an ocean. |
Question: A student is measuring the distance a car travels down a ramp using yards. Which measurement is most similar in length when using the metric system of measurement?
Answer: meter |
Question: A marble is dropped in a glass of water. Which force pulls the marble to the bottom of the glass?
Answer: gravity |
Question: Which scientist formulated rules that describe the observable relationships of plant traits to the traits of the ancestor plants?
Answer: Gregor Mendel |
Question: The invention of the telescope allowed which of the following to take place?
Answer: detailed observation of planets |
Question: Which instrument should a student use to measure exactly 10 milliliters (mL) of water?
Answer: graduated cylinder |
Question: A gas is heated and its temperature increases. What happens to the gas molecules?
Answer: They move faster. |
Question: Which tool is used to measure the diameter of a dime?
Answer: ruler |
Question: A rainforest area is experiencing a severe drought. As a consequence, the insect population has decreased. What will the insect-eating birds most likely do as a result of the drought?
Answer: move to a new area to find food |
Question: Which unit is used to indicate the amount of energy in food?
Answer: calorie |
Question: Wire was looped several times around an iron nail, and the wire's ends were connected to a battery. For which of these will this device most likely be used?
Answer: to create a magnetic field |
Question: Dust and ash entering the atmosphere as a result of volcanic eruptions can affect Earth's
Answer: weather and climate |
Question: During which chemical process is energy absorbed?
Answer: plants photosynthesizing |
Question: When two nuclei are combined into one nucleus, there is a slight change in mass and the release of a large amount of energy. What is this process called?
Answer: fusion |
Question: The sound, light, and heat that a firecracker produces are originally stored as which type of energy?
Answer: chemical energy |
Question: Vehicle exhaust contains a form of pollution called particulate matter. Technologies are being developed to reduce the amount of particulate matter in exhaust. A vehicle that produces less particulate matter would have the greatest impact on which aspect of human health?
Answer: respiratory health |
Question: Janet learns that Earth is tilted. Due to its tilt, some areas on the surface of Earth experience darkness for an entire day. Which plant process is affected most during this darkness?
Answer: photosynthesis |
Question: What types of cells are found only in organisms that reproduce sexually?
Answer: gametes |
Question: Several dinosaur bones are discovered buried in volcanic ash. The type of dinosaur can best be identified by
Answer: comparing to characteristics of known dinosaurs. |
Question: Stretching is considered an important step before engaging in sports. In an investigation to see whether stretching before physical exertion reduces sports injuries, who would the control group most likely be?
Answer: athletes who do not stretch before working out |
Question: In the first half of this century, which technology allowed people, for the first time, to work IN the city but live OUTSIDE the city?
Answer: automobiles |
Question: Most sedimentary rock is made from sediments of other rock. Which of these processes would the sediments most likely go through to form sedimentary rock?
Answer: compaction and cementation |
Question: Rocks and Earth and on the Moon are made of similar materials. What does this observation most likely suggest?
Answer: The Moon was probably formed from material from Earth. |
Question: In any ecosystem, organisms interact with biotic and abiotic parts of the environment. As a result of all of the interactions, the matter within the system is
Answer: recycled when organisms die. |
Question: Data indicate that chemical pollutants contaminate 53% of the waterways that empty into the Chesapeake Bay. These chemical pollutants are found in the tissues of animals living in the bay. Which group of people who live away from the bay might be most affected by these chemical pollutants?
Answer: people who consume fish from the bay |
Question: Which behavior can help animals establish a territory?
Answer: A wolf pack howls to warn other wolves to stay away. |
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