Science 1-2 Review 3QA

________ is formed when a source of light is blocked.

• shadow

• echo

• lightning

• pitch

Sounds can be produced when an object vibrates then cause air particles to move and create sound waves.

• true

• false

Which is the main source of heat and light on Earth?

• stars

• ocean

• moon

• sun

We can use both artificial and natural light in doing many different tasks.

• True

• False

Some sounds warn us of danger.

• True

• False

Light helps us see the beauty of the world.

• True

• False

Light, heat, sound, and electricity are forms of _______.

• matter

• gravity

• energy

• force

The opposite of light is _____.

• white

• darkness

• bright

• massive

The sun, firefly and jellyfish are _____ sources of light.

• natural

• artificial

• man-made

• non-luminous

Flashlight, candle, and flame are _____ sources of light.

• natural

• artificial

• God-made

• luminous