Universe Review Question Preview (ID: 41876)
Stars, Light Years, Components Of The Universe.
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What is happening to stars in main sequence?
a) they are expanding and cooling
b) they are shedding their outer layers
c) they are starting to dim and lose energy
d) they are undergoing nuclear reactions
What type of star is the Sun?
a) a massive supergiant star
b) a medium-sized main sequence star
c) a small white dwarf
d) a medium-sized protostar
Betelgeuse is 495 light years away from earth. How long will it take the light to travel from Betelgeuse to Earth?
a) 4.95 years
b) 49.5 years
c) 495 years
d) .495 years
Why do astronomers use light years to measure distances between objects in space?
a) objects in space are far away from each other
b) objects in space are close to each other
c) objects in space only give off light waves
d) objects in space have different years than earth years
What shape of galaxy is the Milky Way galaxy?
a) irregular
b) elliptical
c) spiral
d) galactical
Where is the Sun and our solar system located in the Milky Way?
a) the center of the galaxy
b) the edge of the galaxy
c) the top of the galaxy
d) the bottom of the galaxy
What is a light year?
a) the density of light in one year
b) the distance light travels in one year
c) the diameter of light emitted in one year
d) the Doppler effect of light in one year
Why is the sun brighter than any other star when viewed on earth?
a) the sun is closer than any other star
b) the sun is larger than any other star
c) the sun is brighter than any other star
d) the sun is hotter than any other star
What is the order of objects in the universe from smallest to biggest?
a) universe - galaxies - nebulae - stars - planets
b) stars - nebulae - planets - galaxies - universe
c) nebulae - galaxies - stars - planets - universe
d) planets - stars - nebulae - galaxies - universe
What does red shift tell astronomers?
a) objects in the universe are moving away from each other and expanding
b) objects in the universe are moving toward each other and contracting
c)
d)
What is the Big Bang theory?
a) universe was cool and then expanded
b) universe was large and then got smaller
c) universe was hot, dense, and expanded
d) universe expands and contracts
What is a nebula?
a) clouds of dust and gas that forms stars
b) an explosion of a dying star
c) a wave emitted from stars
d) the core of a star
On the HR Diagram, where do you find stars that have a high luminosity?
a) top
b) left
c) bottom
d) right
On the HR Diagram, where do you find stars with low luminosity?
a) top
b) left
c) bottom
d) right
On the HR Diagram, where do you find stars with higher temperatures?
a) top
b) left
c) bottom
d) right
On the HR Diagram, where do you find stars with lower temperatures?
a) top
b) left
c) bottom
d) right
What electromagnetic wave has the longest wavelength, the least energy, and low frequency?
a) microwave
b) visible light
c) gamma rays
d) radio waves
Which electromagnetic wave has less energy than ultraviolet and is the only part of the spectrum humans can see?
a) microwave
b) visible light
c) gamma rays
d) radio waves
What electromagnetic wave has more energy than radio waves but less frequency than infrared?
a) microwave
b) visible light
c) gamma rays
d) radio waves
Which electromagnetic wave has a higher frequency than visible light and more energy than x-rays?
a) microwaves
b) visible light
c) gamma rays
d) radio waves
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