Astronomy Exam Review

Front

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.

Back

Blue shifted

Front

Microwaves have a ____________ frequency than gamma waves.

Back

Lower

Front

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

Back

increases

Front

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

Back

Cosmic microwave radiation (CBR)

Front

Which possible fate of the universe says that gravity will take over and pull objects back toward each other? Options: The Big Crunch, The Big Rip, The Big Freeze

Back

The Big Crunch

Front

Which force most likely causes our universe to expand as it is currently? Options: Dark matter, Gravity, Dark energy, Compression

Back

Dark energy

Front

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

Back

Equal

Front

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

Back

Elliptical

Front

As an object gets closer to the sun, its speed?

Back

Increases

Front

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

Back

Becomes a circle