Front

What is an opaque object?

Back

An opaque object is one that does not allow light to pass through it. Example: wood.

Front

What is a way to communicate with light?

Back

A traffic light is a way to communicate with light.

Front

What does it mean when some light passes through an object?

Back

It means the object is not opaque; it can be transparent or translucent.

Front

What does vibrate mean?

Back

To vibrate means to move back and forth quickly.

Front

What is it called when light waves bounce off an object?

Back

It is called reflection.

Front

What is a transparent object?

Back

A transparent object allows light to pass through completely. Example: clear glass.

Front

What is a translucent object?

Back

A translucent object allows some light to pass through but not all. Example: wax paper.

Front

What is sound?

Back

Sound is a type of energy made by vibrations.

Front

How do we hear sound?

Back

We hear sound when vibrations travel through the air and reach our ears.

Front

What is an example of a vibrating object?

Back

A guitar string when it is plucked.