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