Origins of the Universe & Gravitational Forces Review

Space and all the matter & energy in it

• Space

• Universe

• Earth

• Milky Way

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Scientist that developed the law of universal gravitation

• Albert Einstein

• Georges Lemaitre

• Edwin Hubble

• Sir Issac Newton

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the universe began a tremendous expansion 13-15 billion years ago

• big bang theory

• red shift

• light abundance

• theory of life

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The theory that provide support of the big bang theory

• red shift

• blue shift

• red expansion

• theory of life

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The universe is currently

• expanding

• staying the same

• getting smaller

• shrinking

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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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All the stars we observe from Earth emit light that is shifted, to varying degrees, to longer wavelengths. 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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The Big Bang Theory suggests that our universe formed as the result of a huge explosion that sent all existing matter flying outward from a single point. The Big Bang Theory is supported by which of these observations?

• All matter in the universe is composed of the same atoms.

• All galaxies appear to be moving away from all other galaxies.

• All stars in the universe are approximately the same age.

• The universe is relatively the same temperature in all locations.

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

• True
• False

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