AnswersCA-Integrated Science 8 BUnit Test

Unit Test — Unit test Answers

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1
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Which types of electromagnetic waves have wavelengths that are longer than those of visible light but shorter than those of microwaves?

A
gamma rays
B
X-rays
C
infrared light
D
radio waves
2
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Which part of the electromagnetic spectrum is nearest to X-rays?

A
microwaves
B
infrared light
C
gamma rays
D
radio waves
3

The lens in the eyepiece of a reflecting telescope breaks. How will this most affect the function of the telescope?

A
Magnified images will appear upside down.
B
Magnified images will not be created.
C
Light from distant objects will not be captured.
D
Light rays will not be sent to the eyepiece.
4

Bees can see into the ultraviolet region of the electromagnetic spectrum. Compared with humans, bees can sense electromagnetic waves that have

A
a lower frequency and a shorter wavelength.
B
a higher frequency and a longer wavelength.
C
a lower frequency and a longer wavelength.
D
a higher frequency and a shorter wavelength.
5

The diagram shows parts of a wave.Which is shown by the letter X?

Question illustration
A
trough
B
amplitude
C
crest
D
wavelength
6

The diagram shows two objects made of the same kind of glass.Which statement best compares light passing through the two blocks?

Question illustration
A
Light is not separated by wavelength as it exits Object X.
B
Light moves faster as it moves within Object X.
C
Light is only refracted once as it passes in and out of Object Y.
D
Light is refracted less when it passes through Object Y.
7

The energy of microwaves is less than the energy of ultraviolet light. Which comparison of the energies of electromagnetic waves is correct?

A
Gamma rays have higher energy than microwaves because gamma rays have shorter wavelengths.
B
Gamma rays have higher energy than microwaves because gamma rays have lower frequencies.
C
Infrared light has lower energy than X-rays because infrared light has shorter wavelengths.
D
Infrared light has lower energy than X-rays because infrared light has higher frequencies.
8

Leon sees a poster that shows a lake in front of a snow-capped mountain. The mountain appears upside down in the lake.

A
The surface of the lake is smooth.
B
The surface of the lake is transparent.
C
The surface of the lake is polished.
D
The surface of the lake is rough.
9

Which of these most directly affects what happens to white light when it hits an object?

A
the properties of the object
B
the source of the light
C
the speed at which the light travels
D
the distance of the object from the light
10

Which color of white light bends the least when it is refracted by a prism?

A
blue
B
yellow
C
green
D
violet
11

Which materials can be used to make fiber optic strands?

A
metal and glass
B
glass and plastic
C
plastic and metal
D
glass and ceramic
12

Amara draws the ray diagram shown.Which describes Amara’s mistake?

Question illustration
A
She should have drawn a concave lens instead of a convex lens.
B
She should have drawn the image right-side up instead of upside down.
C
Ray 2 should cross through the focal point on the right side of the lens.
D
Ray 3 should point at a downward angle after passing through the lens.
13

An angle of refraction is the angle between the refracted ray and the

A
incident ray.
B
normal.
C
medium.
D
boundary.
14

Donna shines a flashlight and a laser pointer on a sheet of paper. She holds each device at an equal distance from the paper. How does the light hitting the paper from each device appear different?

A
The light from the flashlight lights up a larger area of the paper.
B
The light from the laser pointer lights up a larger area of the paper.
C
The light from the flashlight magnifies a larger area of the paper.
D
The light from the laser pointer magnifies a larger area of the paper.
15

Ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. Simon says that the clay appears red because it allows red wavelengths to pass through it.Which statement best explains who is correct?

A
Ingrid is correct. The clay appears red because it reflects red wavelengths.
B
Ingrid is correct. The clay appears red because it is a type of matter.
C
Simon is correct. The clay appears red because it allows red wavelengths to pass through it.
D
Simon is correct. The clay appears red because it is a solid.

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