Astronomy Unit 2 Exam

What is the biggest contradiction to the Big Bang Theory?

• Law of Conservation of Matter

• Law of Conservation of Energy

• Theory of Gravity

• Both a and b

Astronomers have discovered we can see as little as 10% of matter in the solar system. What is the other 90%

• Light energy

• Dark energy

• Dark Matter

• Light Matter

The force that supports the idea of the constant expansion of the Universe is also called what?

• Light energy

• Dark Energy

• Dark matter

• Light matter

What are quasars?

• A galaxy that has a bulge in the middle and arms that move outward

• A huge group of single stars, star systems, star clusters that are held together by gravity

• A group of stars

• Young galaxies with giant black holes at their centers

What is the hottest layer of the sun?

• Core

• Photosphere

• Chromosphere

• Corona

Solar flares cause what to happen on earth?

• Increase temperature

• Increase daylight

• Auroras

• Flauroas

What are the dark spots in the picture below called?

• Sun spots

• Dark spots

• Solar spots

• Solar flares

Why do we have a leap year every four years?

• Earth's rotation

• Earth's revolution

• Earth's orbit

• Earth's axis

Why do we have seasons?

• Earth's rotation

• Earth's revolution

• Earth's orbit

• Earth's axis

What do all stars start out as first in their life cycles?

• Supergiants

• Protostars

• Nebulas

• Neutron Stars