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ITBS Level 12 Grade 6 Science 4
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ITBS Level 12 Grade 6 Science 4
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25 Questions

1. What word describes the wearing away of rock and earth by wind and water currents?
2. One measure often used to approximately judge whether a person might have a healthy weight is body mass index, which is calculated from a person's height and weight.
The chart below shows what categories people of various heights and weights fall into according to their body mass index.

"Ethan is 5' 7' tall and weighs 110 pounds. How would he be classified according to this chart?
3. What is the ultimate source of energy for most ecosystems on Earth?
4. What is the outer layer of the Earth called?
5. What is one difference between sand and soil?
6. In Lima, Peru, an earthquake one day has a local magnitude of 3.5 on the Richter scale. Two weeks later, another earthquake has a local magnitude of 4.0. Which of the following MUST be true about the two earthquakes?
7. The water that flows beneath the Earth's surface, within soil or through cracks in rocks, is called:
8. Which of the following best describes the role the yellowfin tuna plays in the ecosystem?
9. Organisms have some naturally occurring variations in their traits; variations that tend to aid an organism's survival tend to be passed on because organisms with those variations are more likely to survive and have offspring. Which of the following terms describes this process?
10. What force keeps the Earth in orbit around the Sun?
11. Which of the following is the MOST narrow level of biological classification?
12. Sandstone is formed by the accumulation of sand grains that are compacted and cemented together by calcite and other minerals. What kind of rock is sandstone?
13. If a cold-blooded animal such as a lizard senses that its body temperature is getting too low, which of the following is it MOST likely to do?
14. A person with a bacterial infection notes that his urine has a strong, unpleasant smell. In which system is it MOST likely that the infection is present?
15. Some animals, such as bears and ground squirrels, undergo long periods of inactivity during the winter during which they live off their stored fat. What is this process called?
16. Why are coastal temperatures generally more constant and moderate than inland temperatures at the same latitude?
17. What is the term for a pure substance that cannot be broken down chemically?
18. Yellowfin tuna prey on smaller fish and are preyed on by sharks. Which of the following is NOT likely to lead in the short term to a decrease in the yellowfin tuna population?
19. Joe pushes a block at a constant speed in a straight line across a cement floor. How does the force he exerts compare to the force of friction on the block?
20. Which of the following can NOT be present in a single-celled organism?
21. Why is a glass window transparent?
22. Boiling is the change of state from a liquid to a gas. What is the term for the reverse process, the change from a gas to a liquid?
23. What is the term for the study of animals?
24. When two chemicals react, what happens to their internal energy?
25. How does the Sun compare to other stars in the galaxy?

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