Origin Forces Composition of Universe

As part of the Big Bang Theory of the formation of the universe, scientists believe that over time, the universe is continually changing in what characteristic?

• From more dense to less dense

• From rotating to stationary

• From cooler to hotter

• From very large to very small

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NGSS.HS-ESS1-2

Stars we observe from Earth emit light that is red-shifted, to varying degrees. This evidence is used to support the Big Bang Theory because it shows that stars we observe -

• are all older than our Sun.

• are made up of helium gas.

• use nuclear fusion to make light.

• are moving away from us.

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NGSS.HS-ESS1-2

The theory of the origin of the universe that is most popular among space scientists suggests that our universe originated how long ago?

• 10 – 20 centuries ago

• 10 – 20 thousand years ago

• 10 – 20 million years ago

• 10 – 20 billion years ago

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NGSS.HS-ESS1-2

Cosmic Microwave Background Radiation (CMBr) is the term used to describe the residual microwave radiation observed everywhere in the universe that seems to have no single source. The observation of CMBr is used as evidence of the Big Bang Theory because it is believed to be -

• the result of collisions between neighboring galaxies.

• particles of dust that have absorbed radioactivity.

• radiation left over from the rapid expansion of the early universe.

• light energy emitted from the source of the Big Bang.

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NGSS.HS-ESS1-2

What were the original two elements in our universe?

• Hydrogen and Lithium

• Helium and Oxygen

• Helium and Hydrogen

• None of the above

The light we see from objects in the sky are from the past

• True
• False

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Space and all the matter & energy in it

• Space

• Universe

• Earth

• Milky Way

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NGSS.HS-ESS1-2

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 as a singularity 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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NGSS.HS-ESS1-2

The red-shift in the spectral lines of light, reaching us from other galaxies implies that these galaxies ____________.

• Are moving closer to one another

• Are moving farther apart from one another

• Are in rapid rotation

• Redshift doesn´t exist

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NGSS.HS-ESS1-2

The term big bang refers to _______________.

• The origin of the universe

• The ultimate fate of the universe

• A supernova explosion

• The formation of a quasar

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