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Components Of The Universe
Test Description: Questions are based off of Texas objectives for 8th grade science.
Instructions: Answer all questions to get your test result.
1) Which two properties did Hertzsprung and Russell use to classify stars?
A
Magnitude and Luminosity
B
Luminosity and Brightness
C
Temperature and Size
D
Temperature and Magnitude
2) Why are stars different colors?
A
The stars are different distances away.
B
The stars are in different galaxies.
C
The stars have different numbers of planets orbiting them.
D
The stars are different temperatures.
3) What is the general relationship between the surface temperature and magnitude of a main sequence star?
A
As the temperature increases, the magnitude decreases.
B
As the temperature increases, the magnitude also increases.
C
As the temperature remains the same, the magnitude increases.
D
As the temperature increases, the magnitude remains the same.
4) Which of the following describes the characteristics of the Milky Way Galaxy?
A
Huge, flattened central disk with spiral arms coming out.
B
Huge, lots of gas and dust, no definite shape.
C
No definite shape, very little gas and dust.
D
Huge, contains old stars, very little gas and dust.
5) Our Sun is one of many stars that has been classified as average. Its absolute magnitude and its temperature place it in the middle of what group on the Hertzsprung Russell diagram?
A
Super Giant
B
Main Sequence
C
Red Giant
D
Black Dwarf
6) In between stars, great clouds of dust and gas are where stars are born. What is this collection of dust and gas called?
A
Protostars
B
Neutron stars
C
Nebula
D
Supernova
7) Where in the Milky Way Galaxy would our solar system be found?
A
Near the outer edge.
B
Varies, depending on where it is in orbit around the Sun.
C
About 1 light year from the middle.
D
In the middle.
8) The Sun appears larger than other stars because of its...
A
Distance from Earth
B
High temperature
C
Yellow color
D
Chemical composition
9) How do scientists use light years?
A
Measure the distance from Earth to the Moon.
B
Measure the distance from the Sun to another star.
C
Measure the distance from the Sun to the Earth.
D
Measure the distance from the Sun to Pluto.
10) The planets revolve around our Sun which is the center of our solar system. What keeps our planets in orbit around the Sun?
A
Atmospheric pressure
B
Gravitational force
C
Electromagnetic energy
D
Thermal energy
*select an answer for all questions
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