PT-Science Review

Light sources that are naturally existing in the environment.

• Artificial Sources of Light

• Natural Sources of Light

• Energy

• Opaque

Materials that allow light to pass straight through them.

• Transparent

• Translucent

• Translucent

• Artificial

Materials that do not allow light to pass through them.

• Natural

• Transparent

• Opaque

• Translucent

Materials that allow light to partially pass through th

• Natural

• Natural

• Opaque

• Translucent

It comes from sources which man produced and control.

• Bioluminescence

• Natural Sources of Light

• Artificial Sources of Light

• Sun

It refers to how loud or soft a sound seems to a listener.

• loudness

• echo

• vibrations

• volume

• pitch

It is produced through a repeated sound.

• loudness

• echo

• vibrations

• volume

• pitch

Quick back and forth movement of the particles of matter

• pitch

• volume

• vibrations

• echo

• loudness

It is the loudness and softness of a sound.

• pitch

• volume

• vibrations

• echo

• loudness

It describes how high or low a sound produced.

• loudness

• vibrations

• volume

• pitch

• echo