7.1 Chemical Reactions: Lesson 1-6 TEST

Name

What is the main cause of fizzing when a bath bomb is put in water?

• A. Melting
• B. Freezing
• C. Chemical reaction
• D. Evaporation

Which of these is a sign that a chemical reaction occurs in a bath bomb placed in water?

• A. Change in shape
• B. Change in volume
• C. Production of bubbles
• D. Change in position

What ingredient in bath bombs reacts with water to produce carbon dioxide gas?

• A. Baking soda
• B. Salt
• C. Essential oils
• D. Food coloring

When citric acid and baking soda in a bath bomb react, they form new substances. This is an example of:

• A. Physical change
• B. Chemical change
• C. State change
• D. Reversible change

Why does a bath bomb dissolve faster in hot water than in cold water?

• A. Hot water causes a physical reaction
• B. Hot water increases the reaction rate
• C. Hot water changes the chemical composition
• D. Hot water decreases the amount of carbon dioxide produced

What happens to the citric acid molecules and baking soda during the chemical reaction in a bath bomb?

• A. They disappear
• B. They combine to form new molecules
• C. They separate into individual atoms
• D. They remain the same but move faster

If you made a bath bomb without citric acid, what would most likely happen?

• A. It would fizz more
• B. It would not fizz
• C. It would dissolve slower
• D. It would change color

Which gas is produced by the reaction in a bath bomb?

• A. Oxygen
• B. Nitrogen
• C. Carbon dioxide
• D. Hydrogen

What is the role of water in the reaction of a bath bomb?

• A. It acts as a catalyst
• B. It reacts with baking soda to produce gas
• C. It dissolves the ingredients to allow them to react
• D. It neutralizes the acids and bases