a line, real or imaginary, around which something spins

an instrument that uses a magnet to show direction

bowl shaped indents on a surface caused by a collision

In ________________, Earth faces the sun and is lighter. In _________________, Earth faces away from the sun and is dark.

a force that pulls objects toward the center of the Earth

a natural satellite that orbits a planet

the path an object takes as it travels around another object in space

24 hour period - time it takes the Earth to make one complete ______________________ on its axis

a dark area caused when an object blocks light falling on a surface

the star at the center of our Solar System that supplies heat and light to the Earth

an instrument that measures the time of day using the position of the sun

a planet in our Solar System that has life on it