Under a pure violet light, a bright red balloon appears to be black. What is happening?

C. A pure red surface does not reflect violet light.

A. The violet light is too dim to light up the balloon.

B. Red balloons absorb red light.

D. A pure violet light bends around a red object.

Which characteristic of a surface determines the frequencies of light it will reflect?

A. the type of matter on its surface

D. the material below its surface

A bright star will appear just as bright as a dim star if the bright star is

A. farther away than the dim star

C. the same distance away as the dim star

D. seen from orbit around Earth

Unless they use radio communication, astronauts in space cannot hear each other, even if they can see each other. This is because ...

B. light can pass through the vacuum of space, but sound cannot

A. the space suit blocks any incoming sound

C. the astronauts get too far away from each other to hear

D. the cold of space soaks up the sound

A flashlight's beam grows dimmer the farther away the light travels. Which statement explains why this occurs?

A. The light beam spreads out as it travels away from the source.

B. Air absorbs energy from the light.

C. Air reflects energy from the light.

D. The light beam is slowed by friction as it travels.

Laser light reflected off the moon can be used to accurately measure the distance to the moon because

D. the speed of light is constant

A. the speed of light slows as it approaches the moon

B. the speed of light increases as it travels through space

C. the speed of light is determined by the distance to the object

What happens to a beam of light as it passes from air to water?

A. It will move at a faster speed.

B. It will continue to move in a straight line

D. Light cannot pass through water.

How does the speed of light compare to the speed of sound?

A. The speed of light is faster than the speed of sound.

B. The speed of sound is faster than the speed of light.

C. The speed of sound and the speed of light are equal.

D. The speed of light is slower than the speed of sound.

Why is it impossible to see an object wrapped inside aluminum foil?

A. Aluminum foil is transparent.

B. Aluminum foil is translucent.

D. Aluminum foil seals the light inside.

When light strikes a straight mirror it is

C. reflected evenly in a regular, predictable path

A. scattered in many directions

B. always reflected back to the light source

Which material will scatter light the most?

B. a wrinkled piece of aluminum foil

D. a piece of dark construction paper

In which type of mirror is the image flipped upside down as well as reversed left to right?

D. mirrors can only reverse the image one way at a time.

What happens to a beam of light that shines on the surface of water at an angle?

D. It passes through the water but at an angle.

A. It will reflect off the water at the opposite angle.

B. It goes straight into the water.

C. It reflects off the water at the same angle.

An image seen through a lens is out of focus. If the distances between the object and the lens and the viewer and the lens cannot be changed, how can the image be brought into focus?

D. Add a second lens to refocus the light.

B. Tilt the lens to a different angle.

C. Replace the object with a bigger one.

What happens to light as it passes through a convex lens?

B. It is bent inward toward a focal point.

A. It is bent outward toward the edges of the lens.

C. It moves faster as it passes through the lens.

D. It keeps moving in a straight line.

Which is a lens' focal point?

a point where the lines of light coming through the lens come together

a point on the edge of the lens where it should be held

a point between the light source and the lens

Why is it possible to know what lenses will be needed to build a telescope before it is built?

D. The shape, size, and placement of the lenses used can be calculated.

A. Telescopes are all built the same way.

B. Telescopes have a similar length, and all lenses are the same.

C. As long as there is a pair of convex and concave lenses, the telescope will work.

As you view an object through a straight (regular) lens, how is its image affected?

It is seen exactly as if through a window.

What happens to light energy that is absorbed by an object?

D. The light energy is converted to heat energy.

A. The light energy is converted to nuclear energy.

B. The light energy is converted to electrical energy.

PS Light Energy

Authored by Emilio Casado

Science

8th Grade

NGSS covered

Used 72+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is not true of a yellow object?

A. It absorbs all colors except yellow.

B. It reflects no colors except yellow.

C. It reflects all colors except yellow.

D. It absorbs green light.

Which set of three colors has the lowest frequencies of light?

A. red, blue, and violet

B. red, orange, and yellow

C. green, blue, and purple

D. red, yellow, and blue

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which part of the electromagnetic spectrum is visible?

A. a tiny part of it

B. all of it

C. none of it

D. most of it

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The colors we see on the electromagnetic spectrum are known as

A. visible light

B. ultraviolet

C. radioactive

D. optics

Which object reflects a lower frequency of light, a red, yellow, green, or blue object?

A. a different form of energy

B. blue

C. green

D. red

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Insects can see colors from blue to those that go beyond violet on the color spectrum. This means that insects see ...

A. a higher frequency of light than humans see

B. a lower frequency of light than humans see

C. a yellow "bug" light on a porch

D. higher frequencies than humans see

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which colors are listed in order of lowest to highest frequency of light?

A. red, green, and purple

B. purple, green, and red

C. red, yellow, and orange

D. red, blue, and yellow

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PS Light Energy

Which of the following is not true of a yellow object?

Which set of three colors has the lowest frequencies of light?

Which part of the electromagnetic spectrum is visible?

The colors we see on the electromagnetic spectrum are known as

Which object reflects a lower frequency of light, a red, yellow, green, or blue object?

Insects can see colors from blue to those that go beyond violet on the color spectrum. This means that insects see ...

Which colors are listed in order of lowest to highest frequency of light?

Which colors will create white light when they are combined?

Under a pure violet light, a bright red balloon appears to be black. What is happening?

Which characteristic of a surface determines the frequencies of light it will reflect?

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