Light and Sound Study Guide

How fast does light travel?

• 186,000 miles per minute

• 186,000 miles per second

• 186,000 feet per minute

• 186,000 yards per second

How long does it take the sun's light to reach Earth?

• 6 minutes

• 7 minutes

• 8 minutes

• 8 years

Light travels in straight lines called _______.

• rays

• rods

• cones

• tracks

Opaque objects allow ______ percent of light to pass through.

• 100

• anywhere between 0 and 100

• 0

• a billion

Transparent objects allow ______ percent of light to pass through.

• 100

• anywhere between 0 and 100

• 0

• a billion

Translucent objects allow ______ percent of light to pass through.

• 100

• anywhere between 0 and 100

• 0

• a billion

When light energy is absorbed, light energy transfers to ____________ energy.

• gravitational

• electric

• acoustic

• thermal

When light or sound hits something and bounces back, we call it _____________.

• refraction

• reflection

• absorption

• sad

When light changes speed, it is bent, and changes direction. This is called __________.

• reflection

• absorption

• refraction

• terrible.

Sound is caused by ___________ materials.

• turqouise

• sour

• tickling

• vibrating