Solar System vocabulary quiz

axis

• the line

  through the center of a rotating object. The object turns around this line.

• the force on our planet that pulls things toward the center of the Earth. It's what makes things fall when you let go of them. All planets and stars have this force.

earth

• the planet between Venus and Mars. The only planet where life has been found so far!

• the circular path something (like a moon or planet) follows as it travels around something else.

ellipse

• the star

  that the Earth moves around. It gives the Earth heat and light.

• a property of matter by which an object will stay still or stay moving in a straight line if it is already doing so unless the object is acted upon by an outside force.

• a property of matter by which an object will stay still or stay moving in a straight line if it is already doing so unless the object is acted upon by an outside force.

• a

  regular oval shape.

gravity

• a complete circular motion of one heavenly body, like a planet or moon, around another.

• the force on our planet that pulls things toward the center of the Earth. It's what makes things fall when you let go of them. All planets and stars have this force.

inertia

• a property of matter by which an object will stay still or stay moving in a straight line if it is already doing so unless the object is acted upon by an outside force.

• a complete circular motion of one heavenly body, like a planet or moon, around another.

moon

• a large, round object that moves around a planet.

• the circular path something (like a moon or planet) follows as it travels around something else.

• the planet between Venus and Mars. The only planet where life has been found so far!

orbit

• a large,round object that moves around a planet.

• the circular path something (like a moon or planet) follows as it travels around something else.

revolution

• the collection of planets and their moons, along with other celestial bodies, that orbit the sun. Also a similar system orbiting a different star.

• a complete circular motion of one heavenly body, like a planet or moon, around another.

sun

• a complete circular motion of one heavenly body, like a planet or moon, around another.

• the star that the Earth moves around. It gives the Earth heat and light.