3RD TERM SCIENCE REVIEW

An object can be seen when light-

• passes completely through the object without stopping

• reflected from the object reaches the eye

• can enter the eye from all directions at the same time

• is able to reach an object without being reflected

Which of the following best explains why the person shown cannot see the apple?

• Light cannot reach the apple to reflect off of its surface

• The piece of paper is reflecting light energy from the light source

• No light from the light source is able to reach the person

• The light reflected off of the apple cannot reach the person's eyes

In order for the child to be able to see the tree, light from the sun must pass which points?

• W and Y

• X and Y

• W and X

• Y and Z

Which of the following is an observation that supports the idea that light is needed in order to see objects?

• Very bright lights can be harmful to a person's eyes

• Objects appear different in different colored lights

• Objects continue to exist even when no light reaches them

• People are not able to see any objects in a room that has no light

A flashlight is used to shine light through four different materials. Which material would be considered opaque?

• A

• B

• C

• D

Which material would light go all the way through?

• Glass

• Cardboard

• Metal

• Cloth

Which material demonstrates reflection of light?

• A

• B

• C

• D

An image can be seen in a mirror because light from an object that strikes a mirror does what?

• Bends as it passes through the mirror

• Is absorbed by the glass in the mirror

• Adds light and heat to the mirror

• Bounces off the mirror in straight lines

Who discovered in 1753 that strings vibrate at many different frequencies?

• Daniel Bernoulli

• Thomas Edison

• Alexander Graham Bell

• Guglielmo Marconi

Light from the bulb travels in straight lines toward the bowl of water. Which light ray is being refracted?

• W

• X

• Y

• Z