Waves & Their Properties

• Earth Science
• 8th Grade

Waves

Light & Sound

Define the following vocabulary words:

Light

Electromagnetic spectrum

Radio waves

Infrared

Visible light

Ultraviolet

X-ray

Gamma ray

What is the unit used to measure the frequency of a wave?

1. Watt
2. Newton
3. Volt
4. Hertz

Which color of light has the shortest wavelength?

1. Green
2. Violet
3. Yellow
4. Red

What is the phenomenon that causes light to change direction when passing through a medium?

1. Reflection
2. Dispersion
3. Diffraction
4. Refraction

What is the speed of light in a vacuum?

1. 1,000,000 miles per hour
2. 299,792,458 meters per second
3. 100 kilometers per hour
4. 10 meters per second

What happens to the wavelength of a wave when its frequency increases?

1. It increases
2. It decreases
3. It remains the same
4. It is unrelated