Grade 9 Chemical Reactivity Worksheet
This worksheet covers fundamental concepts of chemical reactivity for Grade 9 science students, including types of reactions, factors affecting reaction rates, and indicators of chemical change.
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Grade 9 Chemical Reactivity
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. Which of the following is NOT an indicator of a chemical reaction?
Change in color
Formation of a precipitate
Change in state (solid to liquid)
Production of gas bubbles
2. What type of reaction involves two or more reactants combining to form a single product?
Decomposition reaction
Synthesis reaction
Single displacement reaction
Double displacement reaction
3. A catalyst the rate of a chemical reaction without being consumed in the reaction.
4. Reactions that release heat are called reactions.
5. The law of of mass states that matter cannot be created or destroyed in a chemical reaction.
6. Increasing the temperature generally decreases the rate of a chemical reaction.
True
False
7. In a chemical reaction, reactants are transformed into products.
True
False
8. List three factors that can affect the rate of a chemical reaction.
9. Describe the difference between an exothermic and an endothermic reaction.
Observe the image below, which depicts a chemical reaction. Consider what visible changes are occurring.
10. Based on the image of the thermite reaction, what evidence suggests a chemical reaction is taking place? Explain your reasoning.