Waves Unit Test Review

After the 1600s, how did observations of light being refracted change the way most scientists thought about light?

• They no longer believed that light acted as waves.

• They began to believe that light acted as waves.

• They no longer believed that light acted as particles.

• They began to believe that light acted as particles.

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When light bends as it passes from one transparent object to another, the light is (a)   .

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Prisms separate (a)   light, such as that from the Sun, by wavelength.

Green plants need light in order to survive. Structures in the leaves absorb light, which in turn, helps plants make their own food.

Under which color of light will plants be least likely to make food?

• red

• blue

• orange

• green

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Which part of the electromagnetic spectrum is necessary for the sense of sight in humans?

• radio waves

• gamma rays

• infrared light

• visible light

Which part of the electromagnetic spectrum has the longest wavelengths?

• radio waves

• gamma rays

• infrared light

• ultraviolet light

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A museum sets up a display of fluorescent minerals. Which best describes how electromagnetic waves can be used to enhance the display?

• Infrared light shining on the minerals will cause them to give off visible light.

• Visible light shining on the minerals will cause them to give off infrared light.

• Ultraviolet light shining on the minerals will cause them to give off visible light

• Visible light shining on the minerals will cause them to give off ultraviolet light.

If humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime?

• Ultraviolet light detects the presence of radioactive substances.

• Ultraviolet light shows cold areas as blue and warm areas as red.

• Ultraviolet light causes substances to fluoresce and give off visible light.

• Ultraviolet light transmits information to AM and FM radio receivers.

Which two animals use echolocation?

• bats and humans

• bats and dolphins

• dolphins and humans

• dolphins and butterflies

An ultrasound tech is trying to identify an object, but the screen of the machine is broken. Which statement best describes this situation?

• The generated sound wave will not be able to reflect off of the object.

• The sound wave will not be generated, so there will be no echoes received.

• The echoes will be made but will not be able to be received by the machine.

• The machine will not be able to process the received echoes into images.