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Question: A metal spoon was left in a pot of boiling soup. The cook burned a finger by touching the spoon. Why did the finger get burned?
Answer: The metal spoon conducted heat to the cook's hand. |
Question: Light rays are focused by the lens of a camera through the process of
Answer: refraction. |
Question: Which of these provides the best evidence that the distribution of Earth's oceans has changed over time?
Answer: marine fossils found on land masses |
Question: Which change would have the greatest negative impact on the survival of an owl species?
Answer: an decrease in size of habitat |
Question: Which organ removes cell waste from the blood?
Answer: the kidney |
Question: According to the Big Bang Theory, how is the universe changing?
Answer: It is expanding. |
Question: Light enters the human eye through the
Answer: pupil. |
Question: The stages in the life cycle of an organism are shown below. birth -> growth -> development -> reproduction -> death In which life cycle stage will a new organism be made?
Answer: reproduction |
Question: Baby chicks peck their way out of their shells when they hatch. This activity is an example of which of the following types of behavior?
Answer: instinctive |
Question: Which conclusion can be made about earthworms because they do not have an internal skeleton?
Answer: They are invertebrates. |
Question: The smallest unit of a plant that can perform all of the processes of life is the
Answer: cell. |
Question: Soda water is a liquid that has bubbles of carbon dioxide in it. Which term best describes soda water?
Answer: a mixture |
Question: All stars start forming in the same manner. Some follow the life cycle of the Sun, while others turn into neutron stars or black holes. Which property determines the fate of a star as it develops?
Answer: mass |
Question: If a neutral atom loses an electron, what is formed?
Answer: An ion |
Question: A student mixed baking soda with vinegar and observed that the reaction was endothermic. When is a reaction endothermic?
Answer: when it requires heat to make it happen |
Question: What is the primary energy source that drives all weather events, including precipitation, hurricanes, and tornados?
Answer: the Sun |
Question: Which system absorbs and carries food from the digestive system to the rest of the body?
Answer: circulatory system |
Question: Why do planets stay in orbit around the Sun?
Answer: attraction of gravity |
Question: Earth rotates on its north-south axis. Which statement best describes one complete rotation?
Answer: It takes 24 hours and causes night and day. |
Question: A rock sample will most likely contain
Answer: minerals. |
Question: A jet plane is moving at a constant velocity on a flat surface. Which forces act against the forward motion of the plane?
Answer: friction and air resistance |
Question: Atmospheric greenhouse gases help heat the atmosphere by
Answer: absorbing infrared radiation released by Earth. |
Question: Scurvy is a disease that sailors often got on long voyages. It was discovered that scurvy could be prevented by eating oranges and lemons. This suggests that scurvy is a disease caused by
Answer: a nutritional deficiency |
Question: Runoff from farms that use fertilizers is entering a small lake. This will most directly affect the lake by causing
Answer: algae to grow in the lake. |
Question: Why is protein an important part of a healthy diet?
Answer: It is needed to repair tissue. |
Question: An atom will always have
Answer: equal numbers of protons and electrons. |
Question: Students on two different school campuses are comparing the growth rate of grass three weeks after fertilizer has been applied. The same fertilizer and the same amount of water are used on both campuses. Which additional variable is most important to control when the results of the two investigations are compared?
Answer: type of grass used |
Question: A caterpillar changing into a butterfly is an example of
Answer: metamorphosis. |
Question: Some immune cells are actively involved in ingesting, destroying, and presenting invading microbial antigens on their surface to stimulate other cells to produce antibodies. Which of these cells is responsible for initiating such an immune response?
Answer: phagocytes |
Question: A single prokaryotic cell can divide several times in an hour. Few eukaryotic cells can divide as quickly. Which of the following statements best explains this difference?
Answer: Eukaryotic cells are more structurally complex than prokaryotic cells. |
Question: Which biological process determines the probability that particular alleles will be found in any given gamete?
Answer: meiosis |
Question: When a person speaks into a telephone, sound energy is changed mostly into which form of energy?
Answer: electrical |
Question: In the human body, what part of the central nervous system connects with other nerves outside of the central nervous system?
Answer: spinal cord |
Question: Photovoltaic cells capture photons of sunlight and transform them directly into electricity. Many of Earth's other energy resources are simply transformed solar energy. Which two energy resources store energy that did not begin as solar energy?
Answer: nuclear and geothermal |
Question: What determines how long the Moon takes to complete one cycle of phases?
Answer: the period of revolution of the Moon around Earth |
Question: Oxygen reacts with iron to produce rust and with hydrogen to produce water. Which statement describes both reactions?
Answer: New molecules are formed but the same elements exist. |
Question: What is the primary job of red blood cells?
Answer: transport oxygen |
Question: What kingdom contains organisms that are multicellular, have no chlorophyll, and absorb nutrients from decaying tissue?
Answer: Fungi |
Question: A salvage yard contains a mixture of iron, glass, aluminum, and plastic. Which property of iron does the salvage yard take advantage of when separating the iron from the rest of the materials?
Answer: magnetic |
Question: While a sailor was out fishing, he got lost at sea. Which object would help him direct the boat back to shore?
Answer: Magnetic compass |
Question: Water is a very important part of the physical weathering of rock. Which of these properties of water is most important in causing some of the physical weathering of rock?
Answer: Water expands when it freezes. |
Question: A student uses a telescope to view stars at night. The student notices some of the stars are different colors. The color of a star is determined most by its
Answer: temperature. |
Question: Which function is performed at similarly structured sites in prokaryotic and eukaryotic cells?
Answer: protein synthesis |
Question: Which material is the best natural resource to use for making water-resistant shoes?
Answer: leather |
Question: When hunting by humans causes a species to become extinct, this may produce damaging effects throughout the ecosystem of the extinct species. What is the cause of this damage?
Answer: alteration of a food web |
Question: Sarah's class is learning about mixtures and solutions. Her teacher writes four statements on the board. Which statement best describes a mixture?
Answer: One substance can be separated from the other. |
Question: Which of the following best explains why the Sun appears to move across the sky every day?
Answer: Earth rotates on its axis. |
Question: The theory of spontaneous generation was eventually disproved scientifically by
Answer: conducting a controlled experiment. |
Question: Discarded electronic devices, such as outdated computers and cell phones, contain materials that can be toxic to the environment. Which statement best explains why humans continue to use these technologies?
Answer: Humans value the benefits of these devices over their cost. |
Question: A student crumples up a sheet of paper. Which property of the paper has changed?
Answer: shape |
Question: When a plant dies, it often decomposes and becomes part of the soil. This process is one step in which cycle?
Answer: carbon |
Question: Which would best aid a scientist in discovering how Earth may have changed over time?
Answer: discovering a fossil of a seashell in a wooded area |
Question: Kendall studied the ways in which human body systems work together. He compared the respiratory and circulatory systems. In which way are these two systems similar to each other?
Answer: They both bring oxygen to the body. |
Question: A difference between the oceanic crust and the continental crust is that the oceanic crust is
Answer: more dense than the continental crust. |
Question: Which of these elements is found in the greatest amount in organisms?
Answer: carbon |
Question: After mining removes layers of rock from a hillside, new plants begin to grow in the cracks of the bare rock. The plants beginning to grow are an example of which natural process?
Answer: primary succession in a new habitat |
Question: Improvements in farming technology would most likely
Answer: increase the amount of food produced. |
Question: In a container, a mixture of water and salt is stirred so that the salt dissolves completely. Sand is added to this solution and allowed to settle to the bottom of the container. If the container is placed on a heat source and the liquid evaporates completely, what will be left in the container?
Answer: Salt and sand will both remain in the container. |
Question: Which of the following is formed immediately after fertilization?
Answer: zygote |
Question: Which of the following helped lead to the invention of personal computers?
Answer: integrated circuit |
Question: Blood absorbs oxygen in the
Answer: lungs. |
Question: A student adds sugar, spices, and salt to a bowl of peanuts and stirs them together. What has the student made?
Answer: a mixture |
Question: Over time, non-volcanic mountains can form due to the interaction of plate boundaries. Which interaction is most likely associated with the formation of non-volcanic mountains?
Answer: continental plates colliding with continental plates |
Question: Most stars in the Milky Way are like the Sun. The Sun will eventually become a red giant. After the red giant stage, what determines whether a star will become a white dwarf or a supernova?
Answer: the mass of the star |
Question: How should researchers share their findings with other scientists to validate their study of the effectiveness of a new medication?
Answer: publish the research results in a scientific journal |
Question: Gaseous sulfur dioxide is a compound that combines with water in the atmosphere to form acid rain. What is the primary source of sulfur dioxide?
Answer: combustion of fossil fuels |
Question: The motion of Earth is responsible for several celestial events. Which of the following events is caused by Earth revolving around the sun?
Answer: the days in a year |
Question: What takes place as a light wave enters a denser medium?
Answer: it is refracted |
Question: Deforestation in the rainforest can lead to localized extinctions of populations of some organisms. Once an area is deforested, which is most likely to decrease and result in organisms' extinctions?
Answer: diversity of the resources in the habitat |
Question: Which of the following causes a ship’s iron anchor to sink to the ocean floor when it is released overboard?
Answer: gravity |
Question: In clear weather, a bright light can be seen for a long distance. In conditions of heavy fog, the visibility is greatly reduced. Which of the following explains the reduced visibility?
Answer: Light is scattered by water droplets in the air. |
Question: When the pesticide DDT was first used, it killed nearly every mosquito it touched. Within a few years, however, many mosquitoes became resistant to DDT and survived. What enabled this to happen?
Answer: gene mutations |
Question: When air is heated, it will most likely
Answer: expand and rise. |
Question: The wheels and gears of a machine are greased in order to decrease
Answer: friction |
Question: A student learns that one year on Mercury is about 88 Earth days. This means it takes 88 Earth days for Mercury to
Answer: make one complete orbit around the Sun. |
Question: Two processes are involved in the formation of a sand dune. Which two processes best describe how a sand dune forms?
Answer: wind erosion then deposition |
Question: When a student uses the equation, mass multiplied by change in temperature multiplied by specific heat, what is being calculated? q = m \times C \times \Delta T
Answer: heat gain or heat loss |
Question: Which rock is most likely to contain fossil seashells?
Answer: limestone |
Question: Which occurs as a result of Earth's tilt on its rotating axis?
Answer: seasonal changes in the climate |
Question: Planets remain in orbit around the Sun because of
Answer: gravity. |
Question: Which cells help to destroy pathogens such as bacteria that enter the human body?
Answer: white blood cells |
Question: Eye color in human beings is an
Answer: inherited trait. |
Question: If a species is no longer able to reproduce, it will
Answer: become extinct |
Question: Which of these is hottest?
Answer: The Sun |
Question: In large industrial cities, the emissions from fossil fuels cause the atmosphere to change. Which process allows the atmosphere to change?
Answer: increased buildup of greenhouse gases |
Question: Which is the most likely response of a human to an increase in temperature?
Answer: increasing the amount of perspiration |
Question: An organism's traits are largely determined by the genetic makeup of its parents. A mutation in which kinds of cells in a parent could cause a new trait to appear in the parent's offspring?
Answer: sperm or egg |
Question: Electricity to play your radio can be made using renewable or nonrenewable resources. Which of the following resources are renewable?
Answer: wind and sunlight |
Question: The action of turning off the water while brushing teeth is an example of
Answer: conservation. |
Question: Which objects are the most useful for collecting data on the speed of a toy car?
Answer: stopwatch, calculator, meter stick |
Question: Some microorganisms cause human disease. Other microorganisms are used in making cheese, yogurt, and bread. Based on this information, the relationship between humans and microorganisms can be
Answer: beneficial or harmful |
Question: Which of these objects is visible because it reflects light toward the eye?
Answer: shiny metallic balloon |
Question: Which dog trait is a learned behavior?
Answer: jumping to catch a ball |
Question: When an atom has a neutral charge, which particles within the atom have equal numbers?
Answer: protons and electrons |
Question: A paper bag is ripped into pieces. Which of these BEST describes the pieces of the bag?
Answer: Smaller than the whole bag |
Question: A lizard most likely would be protected from its enemies if it has which characteristic?
Answer: skin color that matches its habitat |
Question: Copper is used in house wiring because it is
Answer: an electrical conductor. |
Question: Which process causes light to bend and form a rainbow?
Answer: refraction |
Question: Sugar is composed of carbon, hydrogen, and oxygen. Sugar is an example of which of the following?
Answer: a compound |
Question: The tendency of a stationary object to resist being put into motion is known as
Answer: inertia. |
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