AnswersSLPS-2001310-EarthSpace B -GFClassification of Living Things

Unit 6: Test Answers

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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.
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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
23

Which statement can be made about the amplitude of any transverse wave?

A
It is the length from the midpoint to the crest.
B
It is half the length from the midpoint to the trough.
C
It is the length of the wavelength.
D
It is half the length of the wavelength.
24

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
25

Clara made a chart to summarize some of the evidence that supports the big bang theory.Which best describes Clara’s error?

Question illustration
A
During redshift, the light source and observer move closer together, not farther apart.
B
The CMB is blue-shifted, not red-shifted, to the microwave region.
C
The temperature of the CMB is cooler, not hotter, than at the time of the big bang.
D
The redshift indicates approaching, not receding, galaxies.
26

What is luminosity?

A
the amount of energy a star emits in a unit of time
B
the brightness of a star as seen from Earth
C
the average temperature of a star during its life cycle
D
the degree of shift toward the red end of the spectrum
27

Lori attended a lecture about the Sun, and the presenter had placed this image on the wall. Which layer of the Sun could this image be referring to?

Question illustration
A
the convection zone, because it shows how energy moves in a convection current
B
the radiation zone, because it shows how energy is transferred through radiation
C
the core, because it shows how the Sun creates energy through the process of nuclear fusion
D
the chromosphere, because it shows how energy is emitted by the atmosphere of the Sun
28

About how old is the Sun?

A
1.2 billion years
B
4.6 billion years
C
6.4 billion years
D
8.2 billion years
29

Which term defines a star system with two stars?

A
binary star system
B
eclipse star system
C
open cluster star system
D
globular cluster star system
30

Which best describes the present-day universe?

A
opaque, expanding very slowly, stars produce heavy elements
B
transparent, expanding at an accelerated rate, stars produce heavy elements
C
opaque, expanding at an accelerated rate, stars produce only hydrogen and helium
D
transparent, expanding very slowly, stars produce only hydrogen and helium
31

What is the correct order of star colors from hottest to coolest?

A
white, yellow, red, blue
B
yellow, orange, white, red
C
red, orange, yellow, blue-white
D
blue, white, yellow-white, orange
32

A Hertzsprung-Russel diagram is shown.

Question illustration
A
red giants
B
white dwarfs
C
supergiants
D
main sequence
33

Which is one physical property that all stars have?

A
They are made of gases.
B
They shine very brightly.
C
They have a triangle shape.
D
They contain iron in their cores.

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