Components Of The Universe: Question Preview (ID: 16775)


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Which two properties did Hertzsprung and Russell use to classify stars?
a) Magnitude and Luminosity b) Temperature and Size c) Temperature and Magnitude d) Luminosity and Brightness
Why are stars different colors?
a) The stars are in different galaxies. b) The stars are different distances away. c) The stars are different temperatures. d) The stars have different numbers of planets orbiting them.
What is the general relationship between the surface temperature and magnitude of a main sequence star?
a) As the temperature increases, the magnitude also increases. b) As the temperature increases, the magnitude decreases. c) As the temperature increases, the magnitude remains the same. d) As the temperature remains the same, the magnitude increases.
Which of the following describes the characteristics of the Milky Way Galaxy?
a) Huge, lots of gas and dust, no definite shape. b) Huge, flattened central disk with spiral arms coming out. c) Huge, contains old stars, very little gas and dust. d) No definite shape, very little gas and dust.
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) Main Sequence b) Black Dwarf c) Red Giant d) Super Giant
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) Supernova c) Neutron stars d) Nebula
Where in the Milky Way Galaxy would our solar system be found?
a) In the middle. b) About 1 light year from the middle. c) Varies, depending on where it is in orbit around the Sun. d) Near the outer edge.
The Sun appears larger than other stars because of its...
a) Yellow color b) High temperature c) Distance from Earth d) Chemical composition
How do scientists use light years?
a) Measure the distance from the Sun to the Earth. b) Measure the distance from the Sun to Pluto. c) Measure the distance from the Sun to another star. d) Measure the distance from Earth to the Moon.
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
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