Astronomy Test #1 Review

What is not a galaxy?

• Optical Galaxy
• Spiral Galaxy
• Elliptical Galaxy
• Irregular Galaxy

What does a spiral galaxy look like?

• A circular saw blade
• A human eye
• A square
• A hexagon

What are in galaxies?

• ice and rock
• dust, gas, and star
• stars and ice
• water and dust

How old is our universe?

• 13.8 thousand years
• 13.8 million years
• 13.8 billion years
• 13.8 trillion years

Galaxies that are moving away from us are _ shifting?

• red
• blue
• yellow
• green

What were the original two elements in our universe?

• Lithium and Carbon
• Hydrogen and Neon
• Helium and Chlorine
• Hydrogen and Helium

The event that marks the beginning of our known universe

• Theory of Evolution
• Big Bang Theory
• Cell Theory
• Blackhole theory

The change in wavelength of light or sound that is due to the relative motion of the source towards or away from an observer.

• Radar Effect
• Doppler Effect
• Light Effect
• Reflection

Galaxies that move closer to us show a what shift?

• Red Shift
• Green Shift
• Orange Shift
• Blue Shift

Distance measurement used by astronomers for distant objects.

• Kilometers
• Light Years
• Miles
• Light seconds