Waves_STEMscopedia

How do ultrasound waves show us what an unborn baby looks like?

• They send high-frequency sound waves into the body, which bounce off internal structures to form an image.

• They emit low-frequency vibrations that pass through tissues and create a visual outline of the baby.

• They release tiny pulses of light that reflect off the baby’s body to generate an image.

• They send electrical signals through the body that map the shape of internal structures on a screen.

Why is a transverse wave called a transverse wave?

• Because the particles of the medium move in the same direction as the wave.

• Because the particles of the medium move at a right angle to the direction of the wave.

• Because the wave transfers energy without moving the particles of the medium.

• Because the wave moves only in circular motions through the medium.

Which statement correctly matches the wave property with its description?

• Amplitude – distance between two crests; Frequency – height of the wave; Wavelength – number of waves per second.

• Amplitude – height of the wave; Frequency – number of waves per second; Wavelength – distance between two crests.

• Amplitude – number of waves per second; Frequency – distance between two crests; Wavelength – height of the wave.

• Amplitude – distance a wave travels in one second; Frequency – total energy of the wave; Wavelength – speed of the wave.

4. Choose two kinds of waves on the electromagnetic spectrum, such as ultraviolet waves and microwaves. Compare them in terms of frequency and wavelength.

Which of the following correctly compares ultraviolet (UV) waves and microwaves?

• UV waves have a lower frequency and longer wavelength than microwaves.

• UV waves have a higher frequency and shorter wavelength than microwaves.

• UV waves and microwaves have the same frequency but different wavelengths.

• UV waves have a lower frequency and shorter wavelength than microwaves.

Why do ultraviolet (UV) waves carry more energy than microwaves?

• Because UV waves have a longer wavelength.

• Because UV waves travel faster than microwaves.

• Because UV waves have a higher frequency.

• Because UV waves move through space differently than microwaves.

Look at the following image of high-pitched and low-pitched sound waves.

How do the frequencies of high-pitched sound waves and low-pitched sound waves compare?

• 1. Low-pitched sound waves have a higher frequency and more energy than high-pitched sound waves.

• 1. High-pitched sound waves have a higher frequency and more energy than low-pitched waves.

• 1. High-pitched sound waves have a higher frequency and less energy than low-pitched waves.

• Low-pitched sound waves have a higher frequency and less energy than high-pitched sound waves.

Which of the following statements correctly compares the wavelengths of waves with different amounts of energy?

• 1. As the wavelength gets shorter, energy in the wave decreases. 

• 1. Wavelength has no relationship with energy. 

• 1. As the wavelength of a wave gets shorter, energy increases. 

• As the wavelength gets longer, amplitude decreases with energy.

An area has two measured earthquakes—a very strong one and a weaker aftershock. Which one had waves with higher amplitudes and why? 

• 1. The very strong one since higher amplitude waves carry more energy. 

• 1. The very strong one since lower amplitude waves carry more energy. 

• 1. The weaker one since its quakes would be low-pitched. 

• 1. The weaker one since it is not visible on the electromagnetic spectrum. 

The distance between any two corresponding points on a wave, such as from crest to crest

• Wavelength

• Frequency

• Amplitude