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ITBS Level 14 Grade 8 Science 6
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ITBS Level 14 Grade 8 Science 6
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24 Questions

1. Which of the following is NOT one of the major systems of the human organism?
2. If unbalanced forces are acting on an object, which of the following must be true?
3. In the nineteenth century, some scientists thought there was a planet even closer to the Sun than Mercury, which they called Vulcan (no relation to the fictional planet Vulcan in Star Trek). Further discoveries showed this planet did not exist, but if there were a planet that close to the Sun, which of the following would definitely be true?
4. Read and answer: When two notes are played that have very close (but not identical) frequencies, it sounds like a single note of a constant pitch that gets louder and softer at a beat frequency equal to the difference in the frequencies of the individual sounds.
Which of the following would decrease the beat frequency of the combined sound?
5. What kind of cell is shown in this diagram?
6. Which of the following best explains why the moon has so many more craters than the Earth?
7. Which of the following is NOT a chemical element?
8. The aorta is a large artery that connects to the left ventricle of the heart. Which organ system does the aorta belong to?
9. For the first few billion years of the Earth's history, there was almost no molecular oxygen in the atmosphere. Now, the atmosphere is about 21 percent oxygen by volume. What is the primary factor that caused this change?
10. What is the term for an object that electricity flows through easily?
11. What function does the Golgi apparatus serve in a cell?
12. Some manual generators work by having the user turn a crank; the generator then produces electricity. What kind of energy does the generator convert to electrical energy?
13. Which of the following is NOT one of the major systems of the human organism?
14. For the first few billion years of the Earth's history, there was almost no molecular oxygen in the atmosphere. Now, the atmosphere is about 21 percent oxygen by volume. What is the primary factor that caused this change?
15. What is the collective term for all the water on and in the planet Earth?
16. The number of organisms that can survive in an ecosystem depends on both living and nonliving resources and factors. What are the nonliving factors (such as temperature, availability of water, etc.) known as?
17. In about 6 billion years, what will happen to the Sun?
18. In about 6 billion years, what will happen to the Sun?
19. What layer of the atmosphere is closest to the Earth?
20. For the first few billion years of the Earth's history, there was almost no molecular oxygen in the atmosphere. Now, the atmosphere is about 21 percent oxygen by volume. What is the primary factor that caused this change?
21. The aorta is a large artery that connects to the left ventricle of the heart. Which organ system does the aorta belong to?
22. In the nineteenth century, some scientists thought there was a planet even closer to the Sun than Mercury, which they called Vulcan (no relation to the fictional planet Vulcan in Star Trek). Further discoveries showed this planet did not exist, but if there were a planet that close to the Sun, which of the following would definitely be true?
23. Igneous rocks are usually formed deep beneath the Earth's crust. Where else can igneous rocks be formed?
24. What is the collective term for all the water on and in the planet Earth?

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