4th Grade - Unit 5 - Waves and Information Unit Test 2023-24

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through a vacuum and do not require a medium. They include visible light, radio waves, and X-rays.

Front

What is a characteristic of electromagnetic waves?

Back

They can travel through a vacuum.

Front

What does frequency mean in relation to waves?

Back

Frequency is the number of waves that pass a point in one second. Higher frequency means more energy.

Front

What is amplitude in wave terminology?

Back

Amplitude is the height of the wave from its rest position. It indicates the energy of the wave; higher amplitude means more energy.

Front

What happens to light when it reflects off an object?

Back

Light reflected from the object's surface must enter your eyes for you to see the object.

Front

What is a transverse wave?

Back

A transverse wave is a wave where the motion of the medium is perpendicular to the direction of the wave.

Front

What is a longitudinal wave?

Back

A longitudinal wave is a wave where the motion of the medium is parallel to the direction of the wave.

Front

How does sound travel through different mediums?

Back

Sound travels through solids, liquids, and gases, but it travels fastest in solids due to closer particle arrangement.

Front

What is the relationship between wavelength and frequency?

Back

Wavelength and frequency are inversely related; as frequency increases, wavelength decreases.

Front

What happens to digital signals in a cell phone call?

Back

When you speak, your cell phone converts sound waves into digital signals, which are then sent to the other phone.