Unit Test: Energy, Waves, Sound, and Light

A wave transfers

• water

• air

• energy

• particles

The number of waves that pass a given point in a certain amount of time is called:

• wavelength

• crest

• amplitude

• frequency

The image shows the bending of the light waves due to a change in speed as the light enters the water. This is called:

• refraction

• thermal expansion

• reflection

• resonance

This occurs when external vibrations match an object's natural frequency (such as what happened on the Tacoma Narrows Bridge in 1940.)

• reflection

• resonance

• refraction

• rarefaction

Sound can travel through solids, liquids, and gases. Which of the following would sound travel through the fastest?

• a puddle of water

• a block of metal

• outer space

• air

The ship in this picture is using a system the utilizes reflected sound waves to detect and locate objects under water. What is the name of this system?

• diffraction

• sonar

• ultrasound imaging

• sonogram

Fishing boats use sonar to locate schools of fish. What characteristic of sound is most important for this application of sonar?

• sound waves reflect off some surfaces

• sound waves interfere when they overlap

• sound waves spread out from a source

• sound waves diffract around corners

What do these two animals have in common?

• they both use the Doppler Effect to ward off predators

• they both use ultraviolet light to find their food

• they can both breathe underwater

• they both use echolocation to find food

What part of the electromagnetic spectrum has the longest wavelength and the lowest frequency?

• radio waves

• gamma rays

• x-rays

• visible light

For radio stations, "AM" stands for amplitude modulation and "FM" stands for frequency modulation. What wave shown would be considered an "FM" signal?

• A

• B

• neither

• both