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- 1. Multiple ChoiceWhat is a reactant?The starting substanceThe ending substance
- 2. Multiple ChoiceWhat is a product?The starting substanceThe ending substance
- 3. Multiple ChoiceUsing the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).Hydrogen and Oxygenwater - 4. Multiple ChoiceUsing the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).Hydrogen and oxygenwater - 5. Multiple ChoiceAngelina mixes 2 substances together in a beaker. The beaker becomes hot and the liquid changes color.
Did a chemical reaction occur?yes, because the properties changed and a new substance was made.no, because the properties did not change. - 6. Multiple ChoiceWhich of the following are NOT signs that a chemical reaction occured?the properties changedbubbles of gas formedcolor stays the samesmells different
- 7. Multiple ChoiceWhat is a precipitate?a change in colora change in temperaturea solid formeda gas formed
- 8. Multiple ChoiceAlex wants to mix two substances together and to find out if a chemical reaction happens. What should he do?test the solubility before and after mixingmeasure the volume before and after mixingmeasure the mass before and after mixingtest the density of the before substance but not the after substances.
- 9. Multiple Choicea student mixes apple juice, water, and cinnamon together. Did a chemical reaction occur?Yes, because the apple juice changed the color of the water.yes, because the temperature stayed the samno, because the properties stayed the same.yes, because dissolving is always a chemical reaction.
- 10. Multiple ChoiceBurning is always a chemical reaction.Truefalse
- 11. Multiple ChoiceSandra was burning a vanilla candle. Was there a chemical reaction?no, because burning is never a chemical reaction.Yes, because the properties of the wick changed.yes, because heat was added.no, because the ash formed was a different substance.
- 12. Multiple ChoiceWhich of the following is NOT a chemical reaction?burning a marshmallow in a campfire.a campfireacid rain turning a copper roof green.Dissolving red Koolaid in water.
- 13. Multiple ChoiceWhich of the following is a chemical reaction?Burning bread in the toaster.melting wax in a microwave.dissolving salt in waterboiling water to make steam.
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