Earth & Space

Which of the following is not contained in a galaxy?

• a gas cloud

• the universe

• an open cluster

• a globular cluster

Where are stars that are both dim and cool found on the H-R Diagram?

• top, right

• top, left

• bottom, right

• bottom, left

What two characteristics are used to plot stars on an H-R Diagram?

• Luminosity, Temperature

• Luminosity, Color

• Color, Temperature

• Spectral Class, Distance

Giant clouds of dust and gas in space are called --

• nebula

• star

• galaxy

• universe

The light-year is a unit used to measure _______ in space

• time

• distance

• speed

If a star located 33 light-years away from earth stops giving off light energy at this very moment. How long will it be before we know?

• 33 years

• 33 seconds

• 33 minutes

What part of the wave is represented by letter A?

• crest

• trough

• amplitude

• wave length

What part of the wave is represented by letter B?

• trough

• crest

• wave length

• amplitude

What part of the wave is represented by the letter C?

• amplitude

• wave length

• crest

• trough

What part of the wave is represented by letter D?

• amplitued

• wave length

• crest

• trough