Introduction to Universe

Space and all the matter and energy in it.

• Earth

• Stars

• The Universe

• Sky

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Approximately how old is the Universe?

• 12 Billion years old

• 6 Billion years old

• 13.7 Billion years old

• 12.3 Billion years old

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How do scientists believe the universe was created?

• The "Big Bang" theory.

• The "Theory of Evolution."

• The sun exploding.

• None of these.

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Which statement is true?

• The galaxies are moving toward us.

• The galaxies are moving away from us.

• The universe remains static or unchanged in motion.

• None of the above

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Astronomers examine the spectra of a distant galaxy and see that it displays a red shift. What does this mean about the motion of the galaxy?

• The galaxy is not moving.

• The galaxy contains mostly red giant stars.

• The galaxy is moving towards Earth.

• The galaxy is moving away from Earth.

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Which of the following is NOT true about the Big Bang Theory?

• It is the scientific explanation of how life began on Earth and evolved over time.
• It is the scientific explanation for the origin of the universe.
• It states that the universe expanded from a single point and is still expanding today.
• It states that the universe used to be much hotter and smaller.

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The attractive force between objects is called....

• force

• Gravity

• inertia

• motion

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When we see the Andromeda galaxy, we are seeing it as it was 2.3 million years ago. Why?

• it takes light that length of time to travel

• light travels really slow in outer space

• light travels faster than sound

• it is an ancient galaxy

The unit of length that astronomers use to measure distance between object in the universe is the

• light year

• Astronomical unit

• mile

• kilometer

Our universe is made up of at least

• millions of galaxies

• millions of stars

• billions of galaxies

• hundred planets