Astronomy Exam Review

According to the Doppler Effect, if an object is moving toward the observer, the light emitted from the object will be _____ and have shorter wavelengths. 

• Blue shifted
• Red shifted
• Green shifted
• The light will not change 

Microwaves have a ____________ frequency than gamma waves. 

• Higher
• Lower

As the wavelength of a wave on the EMS decreases, the frequency and energy 

• decreases
• increases
• stays the same
• increases then decreases 

The universe has been cooling and expanding over time, as evidenced by 

• Cosmic gamma radiation 
• Blue shifts 
• Cosmic microwave radiation (CBR)
• Hubble's constant 

Which possible fate of the universe says that gravity will take over and pull objects back toward each other?

• The Big Crunch
• The Big Rip
• The Big Freeze 

Which force most likely causes our universe to expand as it is currently? 

• Dark matter
• Gravity
• Dark energy
• Compression 

According to Kepler's 2nd law, objects near the sun take __________ time to orbit the sun than object further from the sun.

• More
• Less
• Equal 
• No

According to Kepler's 1st law, planets orbit the sun in slightly _______________ orbits. 

• Elliptical
• Circular
• Straight
• Curved 

As an object gets closer to the sun, it's speed 

• Stays the same
• Decreases
• Increases

What happens to an ellipse when its eccentricity gets closer to zero?

• Becomes more elliptical
• Becomes more oval
• Becomes a circle
• Doesn't change