Share ScienceSolar System
Save to Folder
rotation
the time it takes the Earth to make one complete rotation on its axis (24 hr period)
axis
a line, real or imaginary, around which something spins
compass
an instrument that shows direction and uses a small magnet to show North. (N E S W)
shadow
a dark area caused when an object blocks light falling on a surface
sundial
an instrument that measures the time of day using the position of the Sun.
day/night
day: Earth faces the Sun and is lighted night: Earth faces away from the sun and is dark
orbit
the path one object takes as it revolves around another object in space
craters
bowl shaped indents or cavities on the surface of a planet that are caused by a collision with another object
moon
a natural satellite that orbits a planet
Sun
the star at the center of our Solar Systems and supplies heat and light to Earth, its gravity keep the system in orbit.
Earth
a planet in our Solar System that has life on it
gravity
a force that pulls objects toward the center of the Earth
