Solar System

4. / the amount of time it takes the Earth to rotate
6. / the nemonic device to remember the order of the planets from the sun
9. / the inner planets that are made from rock
12. / if the southern hemisphere is tilted toward away from the sun, what is season is the northern hemisphere experiencing
13. / to light up
15. / when the entire moon illuminated
17. / the outer planets
18. / quarter when the left side of the moon is illuminated
19. / the spinning motion the Earth does that causes day & night

1. / the invisible line the Earth spins on
2. / if the northern hemisphere is tilted towards the sun, what season is the southern hemisphere experiencing
3. / the circular motion the Earth does that causes seasons
5. / the amount of time it takes Earth to revolve
7. / when none of the moon is illuminated
8. / the planet that has a cloud blanket that traps thermal energy
10. / when the right side of the moon is illuminated
11. / the planet that looks like our moon and is the smallest
14. / how long does a moon phase take to complete
16. / the planet with a thin atmosphere, canyons & riverbeds