| A | B |
|---|
| rotation | causes day and night, takes 24 hours |
| revolution | causes seasons, takes 1 year |
| orbit | the path an object follows as it revolves |
| axis | an imaginary line that the Earth rotates around |
| phase | one of the different shapes the moon appears to take as it travels around the Earth |
| satellite | an object that revolves around another object |
| Aristotle and Ptolemy | believed the sun revolved around the Earth |
| Nicolaus and Copernicus | Believed the Earth revolved around the sun |
| full moon | when the moon appears to be fulled lit |
| new moon | when we can not see the moon at all |
| cycle | a repeated pattern |
| ellipse | the oval path the Earth takes around the sun. |
| sun | made of hydrogen and helium |
| earth | Atmosphere contains mostly oxygen and nitrogen |
| Apollo | Space mission to put the first people on the moon. |
| Neil Armstrong, Edwin "Buzz" Aldrin, Michael Collins | First people to go to the moon |
