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STAAR Science - Grade 8: Ecosystems & the Environment Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Which of the following statements is true about greenhouse gases?

Question 2 2. The temperatures in Siberia are very cold, and only certain organisms can live in this harsh environment. This is an example of ______.

Question 3 3. What is adaptation?

Question 4 4. Which of these statements about abiotic factors is true?

Question 5 5. If an organism lives off of another organism in a manner that neither harms nor helps the host, the host is in a _____ relationship.

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Question 6 6. Why are there so few food webs with more than five levels of consumers?

Question 7 7. Which of the following is the definition of a disturbance in an ecosystem?

Question 8 8. A chaparral plant that is usually only seen in the first couple of years after a fire is also called what?

Question 9 9. Which of the following is the definition of ecological balance?

Question 10 10. Which group begins any simple food chain?

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Question 11 11. Which term best defines an ecosystem?

Question 12 12. What is the single greatest threat to biodiversity?

Question 13 13. Which type of animal is a plant eater?

Question 14 14. What is coevolution?

Question 15 15. When two organisms live together it is called _____?

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Question 16 16. Which is NOT one of the four types of terrestrial ecosystems?

Question 17 17. Why is deforestation harmful to biodiversity?

Question 18 18. Which is NOT an example of an abiotic factor?

Question 19 19. What is the term used to describe a substance that pollutes the air, water or land?

Question 20 20. Which best describes an organism that can produce its own food?

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Question 21 21. Which of the following is biotic?

Question 22 22. Which statement accurately portrays Monarch and Viceroy butterflies?

Question 23 23. What is an adaptation that changes a physical aspect of an organism?

Question 24 24. Which of the following is not an example of ecological balance?

Question 25 25. What is a secondary consumer?

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Question 26 26. How can evolution be observed?

Question 27 27. What is the effect of predation on prey?

Question 28 28. Which of the following describes a relationship between two species, which can be positive or negative for one or both species involved?

Question 29 29. Which of the following events is likely to precede primary succession?

Question 30 30. Pesticides and fertilizers used on farmer's fields are examples of which type of pollution?

STAAR Science - Grade 8: Ecosystems & the Environment Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

STAAR Science - Grade 8: Test Prep & Practice  /  Science Courses
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