What is one condition that is necessary for a hurricane to form?

• Warm ocean water
• A strong cold front
• Cold ocean water
• A strong warm front

**

• the mass of a the plates
• the weight of the plates
• unbalanced force
• gravitational force

**

• Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and is red.
• Barnard’s Star is less bright than the sun, has a surface temperature above 3,800 K, and is red.
• Barnard’s Star is brighter than the sun, has a surface temperature below 5,300 K, and is yellow.
• Barnard’s Star is brighter than the sun, has a surface temperature above 5,300 K, and is yellow

lines on a map that connect areas of the same elevation

• longitude lines
• latitude lines
• contour lines
• contour interval

a slightly oval shaped galaxy

• elliptical
• milky way
• irregular
• spiral

What moon phase is this picture?

• This is the waning crescent phase.
• This is the waxing gibbous phase.
• This is the waning gibbous phase.
• This is the new moon phase.

Why is the light from distant galaxies red-shifted?

• They produce more red light than nearby galaxies
• They are moving away from us
• The longer wavelengths are filtered out more by dust
• They are moving toward us

What is the highest tide?

• High Tide
• Low Tide
• Spring Tide
• Neap Tide

Very hot stars are what color? 

• Blue
• Yellow
• Red
• Orange

All stars begin as a __________?

• giant
• black hole
• white dwarf
• nebula