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Chemical Changes in Materials 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!

Page 1

Question 1 1. What two things must be present for oxidation to occur?

Question 2 2. Which will rust the fastest?

Question 3 3. _____ is a result of oxidation.

Question 4 4. Why is it easy for oxygen to get through the iron?

Question 5 5. Which of the following is NOT a way to prevent oxidation?

Page 2

Question 6 6. Which one of the properties below is NOT an example of a chemical change?

Question 7 7. What chemical property is evident in the picture below?

Question 8 8. What is always formed from a chemical change?

Question 9 9. Which image does not represent a chemical change?

Question 10 10. _____ help you determine if a chemical change is taking place.

Page 3

Question 11 11. What would happen if you mixed an acid and a base together?

Question 12 12. Acids rank _____ on the pH scale while bases rank _____ on the pH scale.

Question 13 13. What kind of paper can you dip in a liquid to see if it is an acid or a base?

Question 14 14. The tiny particles in acid create _____ and the tiny particles in bases create _____.

Question 15 15. Which of the following is an example of an acid?

Page 4

Question 16 16. Which of these examples shows a chemical change?

Question 17 17. Your teacher is performing an experiment in the lab. She takes a test tube with a clear liquid inside and pours it into another test tube with some sort of solid. As she pours the liquid, it immediately starts to bubble up, but no color change occurs. How do we know that a chemical reaction has occurred?

Question 18 18. Which of these examples is a physical change?

Question 19 19. Which of these is the best way to show that a chemical reaction occurred?

Question 20 20. You are given two beakers in class. Both hold some sort of liquid. You are told to pour one of the liquids into the other beaker slowly. As you do so, you notice that a solid is formed at the bottom of the beaker. Is this a physical or chemical change and why?

Page 5

Question 21 21. Which of the following is the best definition for 'non-reversible' when talking about chemistry?

Question 22 22.

You and your friend mix together raisins, peanuts and chocolate chips to make a yummy trail mix. Your friend says that you have created a chemical change. You disagree.

Who is correct and why?

Question 23 23. Which of the following is an example of combustion?

Question 24 24. You have a cup of yogurt in the refrigerator. What could you do to it to cause a chemical change?

Question 25 25. Frying an egg is an example of chemical change caused by _____.

Chemical Changes in Materials 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!

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