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20-2
Test Description: 20-2
Instructions: Answer all questions to get your test result.
1) When the energy is released from the star, what two things is it released as?
A
Heat and energy
B
Radiation and heat
C
Light and heat
D
Radiation and light
2) How fast is radiation and light released from the sun?
A
Speed of light
B
Speed of sound
C
Speed of radiation
D
1 light year
3) How fast is the speed of light?
A
3.8x10^8 m/s
B
9.8x10^15 m
C
7.6x10^9 s
D
4.8x10^11 m
4) What is the brightest star in our night sky?
A
Delta
B
Sirius
C
Copernicus
D
Orion
5) What type of light does an optical telescope observe?
A
Microwaves
B
Macrowaves
C
Visible light
D
Radio waves
6) What type of signal does a radio telescope receive?
A
Visible light
B
Radio waves
C
Macrowaves
D
Microwaves
7) Which is hotter?
A
Red star
B
Blue star
C
Yellow star
D
Orange star
8) What are the two forces on stars?
A
Inward from nuclear fusion, outward from gravity
B
Inward from gravity, outward from nuclear fusion
C
no forces
D
Forces are not balanced
9) What will cuase our sun to start to die?
A
Iron in the core
B
Nuclear fusion will not change
C
Nuclear fusion will speed up because hydrogen will run out
D
Nuclear fusion will slow down because hydrogen will run out
10) What does supergiant stars form when they die?
A
Supernovae
B
White dwards
C
Red giants
D
Moles
*select an answer for all questions
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