Chemical Energy

What is the measure of how fast molecules are moving?

• Speedometer

• Volume

• Temperature

• Thermometer

The substances present BEFORE a reaction occurs are called______.

• Products

• Exponents

• Factors

• Reactants

What is the substance present at the END of a reaction called?

• Product

• Exponent

• Integer

• Reactant

How do you know baking a cake is a chemical reaction?

• It tastes yummy.

• A new substance is formed.

• You mixed it together.

• It has ingredients.

In EXOTHERMIC reactions, energy is _____ from the reaction to the surroundings.

• Absorbed

• Released

• Eliminated

• Evaporated

In ENDOTHERMIC reactions, energy is _____ by the reaction system from the surroundings.

• Absorbed

• Released

• Eliminated

• Obliterated

What usually happens to TEMPERATURE in an ENDOthermic reaction?

• Increases

• Decreases

• Stays the same

Temperature usually _____ in EXOthermic reactions.

• Stays the same

• Increases

• Decreases

Photosynthesis is an _____ reaction.

• EXOthermic

• ENDOthermic

Fireworks are an _____ reaction.

• EXOthermic

• ENDOthermic