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Science 7 - Unit 12 Light

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

What is a prism?

a)

a dark unlit shape caused by blocked light

b)

property of light seen as different hues

c)

curving or arched inward

d)

a transparent crystal used to separate light

2.

What does it mean to be opaque?

a)

to put forth or send out

b)

to take in without motion

c)

unable to see through

d)

transparent material for focusing light

3.
What is a spectrum?
a)
able to be seen
b)
property of light seen as different hues
c)
band of colored lights
d)
a transparent crystal used to separate light
4.
Smooth surfaces _______ a lot of light.
a)
reflect
b)
bend
c)
absorb
d)
twist
5.

Which object allows you to see your reflection?

a)

rock

b)

mirror

c)

paper

6.
The three primary colors of light are
a)
Red, Blue, Yellow
b)
Pink, Green, Blue
c)
Violet, Green, Red
d)
Blue, Green, Red
7.
Why does an apple appear red?
a)
All colors are absorbed & none are reflected
b)
All colors are absorbed except for blue, which is reflected
c)
All colors are reflected and none are absorbed
d)
All colors are absorbed except for red, which is reflected
8.
How does light travel
a)
It curves around corners
b)
Really slow
c)
In a straight line
d)
In circles
9.
Sunlight is
a)
not light at all
b)
red light
c)
yellow light
d)
white light
10.
Objects that ABSORB all colors of light will appear _______.
a)
white
b)
black
c)
multi-colored
d)
gray
11.
Objects that reflect ALL colors will appear _____?
a)
Black
b)
White
c)
Gray
d)
Multi-colored
12.
If you are using a green color filter, what color will you only see?
a)
blue
b)
green
c)
white
d)
red
13.
Which term describes when light bounces off of a smooth surface?  
a)
Refraction
b)
Transmission
c)
Absorption
d)
Reflection
14.
When we look into a glass mirror, light...
a)
Bends as it passes through
b)
Bounces back in a random order
c)
Hits the mirror and is absorbed
d)
Bounces back at the same angle it strikes the mirror at
15.
When we looked at our pencil in a beaker of water it looked bent, why?
a)
The light bends the pencil
b)
Light reflects off of the water
c)
Light changes direction in the water
16.
Light travels slower through water than it does through air, this cause the light to be ___________.
a)
reflected
b)
refracted
17.
Which explains why the fork looks different under water?
a)
light can't pass through the glass
b)
the wavelength of light lengthens
c)
the amount of light increases when going through water
d)
light is refracted at an angle
18.
Opaque means...
a)
No light passes through it
b)
All light passes through it
c)
Some light passes through it
19.
A shiny piece of metal will __________ light.
a)
reflect 
b)
refract
20.
What do we call this tool that separates white light into the colors of the Visible Spectrum?
a)
tuning fork
b)
prism
c)
microscope
d)
graduated cylinder
21.
How does light behave as it enters these mediums?
a)
continue its path as straight line.
b)
bends toward the normal
c)
bends away from the normal
d)
reflects
22.

Refraction is when light__________.

a)

Is bounced by an object or material.

b)

Changes speed as it travels in different materials which causes bending.

c)

When light speeds up to over 300,000 km/s

23.

Light emerging from water to air will bend ______ due to the change of speed as it crosses the boundary.

a)

toward the normal

b)

away from the normal

c)

along the normal

24.

A leaf is green. What does this tell you about the light that is being absorbed?

a)

The light is a UV ray.

b)

The light is not a part of the light spectrum.

c)

All colors are reflected except green.

d)

All colors are absorbed except green

25.

What is the angle of reflection equal to?

a)

The angle of refraction

b)

The angle of incidence

c)

The angle of absorption

d)

The angle of light