| A | B | 
|---|
| quarter moon |  | 
| gibbous moon |  | 
| crescent moon |  | 
| full moon |  | 
| new moon |  | 
| Earth |  | 
| Winter in the northern hemisphere |  | 
| Summer in the northern hemisphere |  | 
| The Earth's tilt | This causes the seasons. | 
| Night and day | The result of  the rotation of the Earth. | 
| 24 hours | One complete rotation of the Earth takes____.. | 
| Revolution | The movement of the Earth around the sun. | 
| 365 days or one year | The Earth  revolves around the sun in _____. | 
| one month (about 28 days) | The moon revolves around the Earth in _____. | 
| The moon | Earth's natural satellite (an object that moves around another) | 
| The moon's phases | The moon's different shapes during the month | 
| a star. | A burning sphere of gases. | 
| the sun | The closest star to Earth |