Exploring the World of Waves

You can't hear sounds in outer space because there is no

• medium

• light

• energy

• heat

Wavelengths are usually measured in ....

• seconds

• Hz

• inches

• meters

According to the Law of reflection, a light ray striking a mirror

• continues moving through the mirror in the same direction

• moves into the mirror at a slightly different angle

• bounces off the mirror toward the direction it came from

• bounces off the mirror at the same angle it hits.

What kind of wave is pictured?

• Transverse

• Longitudinal

• surface

• none of the above

What type of wave is a sound wave?

• Transverse wave

• Longitudinal wave

• Electromagnetic wave

• Surface wave

Which of the following is a property of waves?

• Mass

• Frequency

• Volume

• Temperature

What is the unit of frequency?

• Metre

• Hertz

• Newton

• Joule

Which of the following is an example of a transverse wave?

• Sound wave

• Light wave

• Seismic P-wave

• Pressure wave

What happens to a wave when it is reflected?

• It changes speed

• It changes direction

• It changes frequency

• It changes amplitude

What is the speed of sound in air at room temperature (approximately 20°C)?

• 1500 metres per second

• 343 metres per second

• 299,792,458 metres per second

• 1000 metres per second