Astronomy Unit 5 Review

Define the Doppler Effect

• As sound gets closer to you, it gets louder, the wavelengths get shorter and more frequent.

• As sound gets closer to you, it gets quieter, the wavelengths get longer and less frequent.

• As sound gets closer to you, it gets louder, the wavelengths get longer and more frequent.

• As sound gets closer to you, it gets quieter, the wavelengths get shorter and less frequent.

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When galaxies are moving away from each other that means they have a ​ (a)   . When galaxies are moving towards each other, that means they have a ​ (b)   .

• redshift
• blueshift

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When glaxies have a redshift, they are moving ​ (a)   from eachother. As they move away from each other, they are moving ​ (b)   , and creating ​ (c)   space between galaxies.

• away
• faster
• more

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True or False: The universe is expanding in two directions from many different points.

• True

• False

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Leftover radiation after the Big Bang is known as __________________.

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Define light spectra:

• Wavelengths of just red and blue.

• Wavelengths of red, orange, yellow and green.

• Wavelengths of only some light waves.

• The entirety of all wavelengths of light waves

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What is the best description of the big bang?

• A massive explosion that created everything in the universe

• Two planets collided, creating the Sun and other planets

• A rapid expansion of a densely packed, small area that expanded into the universe that we know today

• An explanation of how the universe is expanding and how big it is

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The Big Bang Theory is the most widely accepted theory about the origin of the universe.

• true

• false

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What does the Big Bang theory suggest?

• The universe was just there
• The Milky Way is the only solar system
• The universe is continually expanding
• The universe is collapsing in toward a single point

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How does Cosmic Microwave Background Radiation support the Big Bang Theory?

• Microwaves are found everywhere in the universe.

• Microwaves are useful in our everyday lives

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