Determine if the following statements are TRUE or FALSE.
1. All changes in matter involve chemical reactions.
2. Heat is needed for a chemical reaction to begin.
3. Chemical reactions may occur quickly or slowly.
4. Evaporation is an example of a chemical change.
5. Reactants and products can be elements or compounds.
6. Chemical reactions always produce a gas.
7. Freezing involves a chemical reaction.
8. A banana turning brown is a chemical change.
9. The arrow (→ ) symbol in a chemical equation means a substance is
added or mixed.
10. The symbol (ag) in a chemical equation implies that the substance is
dissolved in water.
1. All changes in matter involve chemical reactions.
2. Heat is needed for a chemical reaction to begin.
3. Chemical reactions may occur quickly or slowly.
4. Evaporation is an example of a chemical change.
5. Reactants and products can be elements or compounds.
6. Chemical reactions always produce a gas.
7. Freezing involves a chemical reaction.
8. A banana turning brown is a chemical change.
9. The arrow (→ ) symbol in a chemical equation means a substance is
added or mixed.
10. The symbol (ag) in a chemical equation implies that the substance is
dissolved in water.
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Answer:
1.false
2.true
3.true
4.true
5.true
6.true
7.false
8.true
9.true
10.true
Explanation:
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