Sign up for FREE

LW EOU Assessment (1/28)- Fields

Last updated almost 3 years ago

6 questions

1

1

1

1

1

3

Question 6

6.

Mr. Kovalik
Grade 8 Science
408-314-1092

Question 1

1.

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.

Question 2

2.

Malachi uses some glue to fix a broken plate. He puts the glue under a desk lamp but the glue doesn’t dry. Then he puts the glue out in the sun and it dries. Why does light from the sun dry the glue when light from the desk lamp does not?

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

Because light from the sun pulls energy out of the glue 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.

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

Question 3

3.

Maya wonders which types of light could heat up a sheet of aluminum. The table below shows what happens when different types of light hit the aluminum.

Based on this information, which type of light is more likely to heat up the sheet of aluminum?

The X-ray light is more likely to heat up the aluminum because the X-ray light can pull energy out of the aluminum when it passes through the aluminum.

The ultraviolet light is more likely to heat up the aluminum because the ultraviolet light bounces off the aluminum, which means that it has more energy.

There is no way to know because they are two different types of light, and different types of light can change a material in different ways.

Question 4

4.

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.

Question 5

5.

Ana wonders how light can affect a mystery material. The table below shows what happens when different types of light hit the mystery material.

Yes, but the mystery material can change in only one way, such as by getting warm, because all the light that a material absorbs will affect that material in the same way.

Yes, and the mystery material can change in one or two different ways, such as by getting warm and/or changing color, because different types of light can cause different changes to a material when they are absorbed.

No. The mystery material can’t change because light is not a physical thing. Light cannot change physical things like the mystery material.

Tyrel is learning about a certain kind of metal used to make satellites. He learns that infrared light is absorbed by the metal, X-ray light is transmitted through the metal, and visible light is reflected off the metal. Tyrel wonders if the metal will get warm if he shines the lights on it.

Can light cause the metal to get warm? Why or why not? Does it matter what type of light shines on the metal?

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

Neither type of light is likely to heat up the aluminum because the aluminum does not take in energy from either the X-ray light or the ultraviolet 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.

There is no way to know whether the mystery material will change or not.