Light Waves- Unit Test

A rug sits in a sunny place on the floor for a long time. Kiara thinks that light from the sun can cause the rug’s color to fade over time. Can light from the sun cause the rug’s color to fade?

• No. Light is not a physical thing, so it cannot change physical things like rugs.

• No. Light can only change things by warming them up, so it cannot cause the rug’s color to fade.

• Yes. The rug can take in energy from the light, causing the rug’s color to fade.

• Yes. Light from the sun can pull energy out of the rug, causing the rug's color to fade.

Tags

NGSS.MS-PS4-2

Key concept 9 states: Light Travels in a..

• curved path

• straight line

• zig-zag pattern

• wave

These graphs show the wavelength and amplitude of light coming from three lasers. Could any of these lasers be giving off a different type of light?

• Yes. Laser 2 could be giving off a different type of light because Laser 2 has a different wavelength than Lasers 1 and 3.

• Yes. Laser 3 could be giving off a different type of light because Laser 3 has a different amplitude than Lasers 1 and 2.

• Yes. All three lasers must be giving off different types of light because every light source gives off its own type of light.

• No. All three lasers must be giving off the same type of light because all three are lasers, and the same kind of light source gives off the same type of light.

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NGSS.MS-PS4-1

Light ...

• can only be reflected

• only comes in one form

• carries energy from one place to another, even through empty space

• is a type of wave that carries energy from one place to another, even through empty space

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

In order to see an object, light must be

• transmitted into your skin

• reflected off the object and into your eyes

• reflected off the object then off the ground then into your eyes

• absorbed by your genetic material

Tags

NGSS.MS-PS4-2

Aniyah has a special type of paper that can permanently change color. She wonders whether light can cause the paper’s color to change. The table below shows what happens when different types of light hit the paper. Based on this information, which type of light can cause the paper to change color?

• The infrared light can cause the paper to change color.

• The X-ray light can cause the paper to change color.

• The ultraviolet light can cause the paper to change color.

• Any of these types of light can cause the paper to change color, because all light carries energy that can cause materials to change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS4-2

In order for light to change an object, that object must _______ the light and its __________.

• reflect, wavelength

• transmit, amplitude

• reflect, energy

• absorb, energy

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NGSS.MS-PS4-2

Different types of light can change a material ...

• in different ways

• in the same way

• only if it transmits the light

• only if it reflects the light

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NGSS.MS-PS4-2

Wei saw a special type of plastic that would melt and become a liquid when it was placed in the sun, but it would not melt when placed under a desk lamp. Why does light from the sun melt the plastic when light from the desk lamp does not?

• Because the plastic can take in energy from the light from the sun, but not from the light from the lamp.

• Because light from the sun carries heat molecules, and light from the desk lamp does not.

• Because light from the sun pulls energy out of the plastic, and light from the desk lamp does not.

• Because the sun gives off a type of light that carries energy, and light from the desk lamp does not.

Tags

NGSS.MS-PS1-4

The two terms to describe a the properties light wave are

• Amplitude: How tall a wave is

• Transmit: to pass through

• Wavelength: How far apart the peaks are

• Absorb: To take in

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NGSS.MS-PS4-1

NGSS.MS-PS4-2