Energy can neither be created nor destroyed, it only be transformed from one form to another.

Light energy travels in a _____?

Heat energy can be transfered from a warm to a colder object?

What kind of material allows light energy to pass through easily?

What type of objects allow a minimal amount of light energy to pass through them?

Which type of materials DO NOT allow light energy to pass through?

What is formed behind an opaque material when light stikes it?

Sound energy is produced by a ___________.

Sound energy travels fastest in _________ materials.

Light energy travels faster than ________.

The main source of light and heat energy on Earth is the ______.

When light stikes an object and it BOUNCES back, it is called ______.

^{When light strikes an object nad it bends, it is called _________.}

When sound energy is reflected or BOUNCES back, it is called an ________.