Slide 1

4 th Grade Science

Slide 2

A quick back-and-forth movement of matter.

Slide 3

A form of energy that travels through the air (in waves).

Slide 4

How high or low a sound is.

Slide 5

The number of vibrations per unit of time.

Slide 6

Allowing light to pass through.

Slide 7

Allowing no light to pass through- the light is absorbed of reflected.

Slide 8

Allowing only some light to pass through.

Slide 9

The bouncing of light off an object.

Slide 10

One small part of a range of energy known as the electromagnetic spectrum.

Slide 11

A transparent solid body often having a triangular basis for separating a light into a spectrum (ROY G BIV), or for reflecting rays of light.

Slide 12

A band of colors produced when sunlight is passed through a prism visible to the eye.

Slide 13

A lens that is thicker at the edges than it is at the center.

Slide 14

A lens that is thicker at the center than it is at the edges.

Slide 15

The bending of light as it moves from one material to another.