Change & Energy

Match it! Select the correct answer from the pull down...Good luck!

What often happens when a chemical or physical change occurs?

What must often be added to increase the speed or ability of two substances to react?

What does liquid water need to change into water vapor?

Which of these is an example of energy involved in a chemical change?

What kinds of energy are produced by bright fireworks?

What energy is required in order for photosynthesis to occur?

When lighting a match, why must it be drawn rapidly along a rough surface?

An exothermic reaction: