The Big Bang is said to have occurred

• 4.6 billion years ago

• 13.8 million years ago

• 100 thousand years ago

• 13.8 billion years ago

Which scientist is credited for discovering red shift in stars spectra?

• Newton

• Doppler

• Foucault

• Einstein

What is the definition of fusion?

• production of gas

• The way a planet produces energy

• The way a star produces energy

• The combination of two planets to make one planet.

Stars that show red shift are. . .

• moving away from Earth

• moving toward Earth

• remaining stationary

In what star stage is the Sun currently in?

• Main Sequence

• Supergiant

• Giant

• Dwarf

What part of the moon do we see from Earth?

• all of it
• the same side
• none of it
• only one quarter

The moon seems to change shape from day to day in a cycle that lasts about a month as it goes through _.

• revolutions
• phases
• rotations
• eclipses

Which moon phase is when you can't see the moon at all?

• Waning crescent
• Full moon
• Waxing gibbous
• New moon

The cycle of the moon lasts about a _.

• day
• year
• week
• month

One complete revolution of the Earth around the sun takes about

• one rotation
• half a year
• one year
• one season