| A | B |
|---|
| What causes night and day? | Earths rotation on its axis |
| What causes a year? | One revolution of Earth around the sun |
| Why do we never see the far side of the moon? | The moon rotates once for each revolution around the Earth. |
| What determines the Moon Phases we see? | How nuch of the sunlit side of the moon faces Earth. |
| What happens in a solar eclipse? | The moon is directly between Earth and the sun. |
| What happens during a lunar eclipse? | The Earth is between the moon and the sun casting a shadow on the moon. |
| What causes tides? | Tides are caused by the gravitational pull of the moon and sun. |
| When are tides the highest? | When the sun, moon and Earth are in a line. |
| What is the difference between a new and full moon? | New mo9on is no moon at all and a full moon is a fully lit moon. |
| From what side does the moon become lit? | From right to left. |
| Reflection | Bouncing back of light from a surface. |
| axis | A line through the center of earth |
| sundial | A device that measures time |
| horizon | The line at which the sky and Earth meet. |
| orbit | The path that an object takes around another body. |
| eclipse | The blocking of light |
| tide | The rise and fall of the surface level of a body of water due to gravity |
| fusion | A change in one element to produce another element and release of energy |
