1. Felipe is observing how acetic acid and sodium bicarbonate react with one another in a volcano model. What evidence can he look for to indicate a chemical reaction has taken place?

2. During a science lab, Jessica records the following data when Liquid A and Liquid B are combined in a beaker. Did a chemical change occur? Why?

3. A science class is placing an iron rod outside and another inside a plastic container. Several weeks later, the iron rod outside rusted. What question was the class trying to answer?

4. Which of the following is an example of a chemical change?

5. Marlene's family goes on an autumn campout to a local state park. During the camp out she notices several things that could be a chemical change. Which of the following is not a chemical change?

6. Which statement is most likely true in explaining the difference in these two pennies?

7. Which of the following pieces of lab equipment is needed to measure the amount of heat released during a chemical change?

8. Susan observes two antacid tablets dropped into water. Bubbles immediately form. When will she know the chemical reaction has stopped?

9. Which of the following chemical equations for a reaction between carbon dioxide and water considered balanced?

10. What is the mass of the products compared to the mass of the reactants? 6CO2 + 6H2O ----- C6H12O6 + 6O2

11. Why is it important for a chemist to have a balanced chemical equation for a reaction?

12. A beaker with two liquid compounds is placed on a hot plate and heated. What question can be best answered from this experiment?

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