Grade 4 Science Unit Test Review S2

What is a wave?

• A disturbance that moves energy through a material.

• Water moves through a pipe when a faucet is turned on.

• The movement of animals in the ocean.

• A shape drawn in the sand.

Which of the following best describes how waves move?

• A leaf floating in a pond.

• Shaking a rope up and down.

• Rolling a toy car down a ramp.

• Blowing air into a balloon.

Which part of a wave is the highest point?

• Trough

• Crest

• Wavelength

• Amplitude

What is the lowest point of a wave called?

• Crest

• Amplitude

• Wavelength

• Trough

What happens when you increase the amplitude of a wave?

• The wave becomes taller.

• The wave becomes shorter.

• The wave disappears.

• The wave moves slower.

Which of the following best describes a wavelength?

• The height of a wave.

• The number of waves per second.

• The distance between two crests or two troughs.

• The speed of the wave.

What type of energy transformation happens when you turn on a light?

• Heat to motion

• Electrical to light

• Sound to motion

• Chemical to heat

Which of the following is an example of heat energy being transferred?

• A lamp turning on.

• A fan spinning.

• Toast coming out burnt.

• A radio playing music.

Which material is the best conductor of heat?

• Plastic

• Wood

• Metal

• Cotton

What happens to an ice cube when heat energy is applied?

• It freezes.

• It melts.

• It disappears.

• It turns into gas immediately.