Chemical Change Worksheet
Explore the fundamental concepts of chemical change, including indicators, types of reactions, and balancing equations.
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Chemical Change Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following is NOT an indicator of a chemical change?
Formation of a precipitate
Change in color
Change in state (solid to liquid)
Release of gas bubbles
2. What type of reaction is represented by: AB → A + B?
Synthesis
Decomposition
Single Replacement
Double Replacement
3. A chemical change results in the formation of new substances with different properties.
4. The law of conservation of states that matter cannot be created or destroyed in a chemical reaction.
5. A reaction that releases heat to its surroundings is called an reaction.
6. Melting ice is an example of a chemical change.
True
False
7. Balancing chemical equations ensures that the law of conservation of mass is upheld.
True
False
8. Describe three observable signs that indicate a chemical change has occurred.
9. Explain the difference between an endothermic and an exothermic reaction.
Observe the image below, which shows a thermite reaction. This is a highly exothermic chemical reaction.
10. Based on the image and your knowledge of chemical changes, what are some of the indicators of a chemical reaction visible or implied in a thermite reaction?