Theories of the universe

What is the big bang theory?

• A theory that states that the universe started in a large mass and then imploded to form everything.

• A theory that states that the universe was there, will be and is there. Is homogeneous and isotropic.

• A theory that states that the universe is slowly coming back to a center.

• A theory that states that the universe started in a small mass and then expanded, the expansion cooled down the temperature and that resulted in the formation of matter, energy, space and time.

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

• 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 universe is...

• expanding

• contracting

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Edwin Hubble discovered that the universe was still expanding by using what technological tool?

• Eyes

• Space probes

• telescope

• Space spy

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How old is the universe?

• 13.7 Billion years old

• 1.3 Billion years old

• 2,020 years old

• 13.7 Million years old

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As the universe expands, the galaxies within it are _______________.

• moving away from each other at great/fast speeds

• moving toward each other.

• exploding.

• gaining new matter.

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Which doesn't explain what scientific theories are?

• Are explanations of natural events or phenomenon

• Has been tested many times and is supported by evidence taken over time

• Is widely accepted

• Based on opinions, hunches and religious ideas; Cannot be changed

What do the initial moments after the Big Bang have in common with the universe as it exists now? Choose the best answer.

• The universe began expanding then, and it is still expanding today.

• All the stars, galaxies, and planets that exist today were formed just a few moments after the Big Bang.

• The universe back then could not sustain life, and it cannot sustain life now.

• The universe was extremely hot then, and it is still extremely hot now.

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_________ is a theory states that the universe originated sometime between 10 billion and 20 billion years ago from an enormous explosion of a small volume of matter at extremely high density and temperature.

• Steady State Theory

• Big Bang Theory

• Expansion Theory

• none of the above

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What was contained in the singularity that gave rise to the Big Bang? Choose the best answer.

• Gamma rays

• electrons in highly excited state

• all the mass, energy, and time in our universe

• one atom

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