How much is the value of an AU? (astronomical unit)

• 150 billion km

• 200 million km

• 50 million km

• 150 million km

What are planets?

• made of gas, dust, ice and orbits the sun

• rocky objects that orbit the sun in an asteroid belt

• orbits the sun, spherical in shape & does not have its own clear path around the sun

• orbits the sun, spherical in shape & has its own clear path around the sun

What does heliocentric mean?

• the belief that everything revolved around the earth

• the Earth and all the planets that revolve around the sun

• rocky objects that orbit the sun in an asteroid belt

• the belief that all the planets revolve around the sun

What is an asteroid?

• rocky objects that orbit the sun in an area between Mars and Jupiter.

• made of gas, dust, ice and orbit the sun

• the belief that everything revolved around the Earth

• orbits the sun, spherical in shape & has its own clear path around the sun

What are comets?

• rocky objects that orbit the sun in an asteroid belt

• the Earth and all the planets revolve around the sun

• made of gas, dust, ice and orbits the sun

• the belief that everything revolved around the Earth

What does geocentric mean?

• the Earth and all of the planets revolve around the sun

• orbits the sun, spherical in shape & does not have its own clear path around the sun

• rocky objects that orbit the sun in an asteroid belt

• the belief that everything revolved around the Earth

A chunk of rock or dust in space

• Meteorite

• Meteoroid

• Meteor

• Comet

A chunk of rock or dust that has reached the Earth's atmosphere

• Meteoroid

• Meteorite

• Meteor

• Comet

A chunk of rock or dust that has reached the surface of the Earth.

• Meteorite

• Meteoroid

• Meteor

• Comet

What is rotation?

• growing

• one way the Earth moves as it spins on its axis

• rounder shaped moon, but not full

• one way the Earth moves as it travels around the sun