Understanding the Universe

What theory explains how the universe began?

• Nebular Theory

• Big Bang Theory

• Galactic Explosion

• Solar Formation

What is one key idea of the Big Bang Theory?

• The universe has always stayed the same

• The universe started small and is now shrinking

• The universe started from a dense point and expanded

• The universe was created by a black hole

What is meant by the "expansion of the universe"?

• Planets are getting bigger

• The Sun is expanding

• Galaxies are moving away from each other

• Stars are exploding

Which theory describes how the universe might end by freezing slowly?

• Big Crunch

• Big Chill

• Big Pop

• Heat Bomb

What is parallax used for in space?

• Measuring heat of stars

• Finding galaxy colors

• Measuring star distance by shift in position

• Predicting meteor showers

Which unit is used to measure distances to nearby stars?

• Kilometer

• Astronomical Unit

• Light-year

• Parsec

How far is 1 light-year approximately?

• 150 million km

• 3.26 km

• 9.46 trillion km

• 1 billion km

What type of galaxy is the Milky Way?

• Elliptical

• Irregular

• Spiral

• Lenticular

What is common in elliptical galaxies?

• Bright spiral arms

• Young blue stars

• Very little gas and old stars

• Ring shapes

What kind of galaxy has no fixed shape?

• Spiral

• Irregular

• Barred Spiral

• Elliptical