space science ssa review

Front

When the sun is directly overhead one hemisphere, resulting in longest day/night.

Back

solstice

Front

When the sun is not pointed toward either hemisphere, resulting in equal day/night.

Back

equinox

Front

The spin of Earth around its axis (24 hours long)

Back

rotation

Front

The theory that our galaxy is 13-15 billion years old, formed from matter expansion.

Back

Big Bang Theory

Front

A collection of billions of stars, nebulae, gases, dust, and planets.

Back

galaxy

Front

What causes us to experience different seasons on Earth?

Back

Earth's tilt

Front

Which term refers to Earth's spin around its axis?

Back

rotation

Front

The Earth spins around its own axis once every ____ hours

Back

24

Front

The Sun appears to move across the sky because...

Back

The Earth is rotating (spinning)

Front

It takes the moon about a _____ to revolve around the Earth

Back

month