Universe

Space and all the matter and energy in it.

• Space
• Solar System 
• Universe
• Sun

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The sun and all of the planets and other bodies that travel around it. 

• Universe 
• Galaxy 
• Star
• Solar System 

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A collection of stars, dust, and gas bound together by gravity.

• Nebula
• Galaxy 
• Universe
• Protostar

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The most commonly accepted theory that explains the beginning of our known universe is the -

• Theory of Evolution
• Big Bang Theory
• Cell Theory
• Blackhole theory

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Which of the following is the largest?

• star
• universe
• cluster
• galaxy

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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 started as a point, expanded, and will return to a point

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________ holds all of the planets in orbit around the sun.

• Gravity
• String
• Bill Nye
• Duct tape

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Since the Big Bang, and even today, the universe is still _____.

• Expanding

• Shrinking

• Cooking

• Spinning

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Most scientists believe the Big Bang Theory explains which of the following questions?

• How our planets and moons formed

• How our universe began

• How the sun turns hydrogen into helium

• How fast light travels through space

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The shape of our Milky Way galaxy can be classified as ____________.

• Spiral
• Elliptical
• Irregular
• French