Universe- Big Bang- Stars

How old is the Universe estimated to be?

• 4.6 billion years old

• 10 billion years old

• 21 billion years old

• 13.7 billion years old

What is not evidence of the Big Bang?

• Doppler Effect

• Background microwave radiation coming from all directions

• Galaxies getting closer to earth in a red shift motion

• abundance of hydrogen and helium in the universe

What best describes a celestial object?

• any object that exists in earth's lithosphere

• any object that exists outside or above earth's atmosphere

• any object found in the hydrosphere

• convection currents found in earth's asthenosphere

What is the best description for a "galaxy"?

• a small group of stars that can resemble a shape

• aligning of the planets

• a collection of billions of stars held together by gravity

• red or blue shift of stars

What does the Big Bang Theory state?

• All matter and energy started out in a small area, the was spread out by a gigantic explosion

• The dinosaurs became extinct when a gigantic asteroid struck earth 65.5 million years ago

• The earth exists in the Milky Way galaxy.

• The Doppler shift only impacts stars that exist near the Sun.

What is the correct shape for the Milky Way Galaxy?

• Elliptical

• Spiral

• Irregular

• Spherical

At approximately which position is Earth's solar system located?

• A

• B

• C

• D

The theory that the universe is expanding is supported by the:

• blue shift of light from distant galaxies

• radioactive decay occurring in the Sun

• nuclear fusion occurring in all stars

• red shift of light from distant galaxies

What causes the gas and dust cloud to condense and become a star?

• Solar Winds

• Gravity

• Density

• Friction

In which sequence are the items listed from least total mass to greatest total mass?

• universe, Milky Way, solar system

• Milky Way, solar system, universe

• solar system, Milky Way, universe

• Milky Way, universe, solar system