| A | B |
|---|
| tides | the daily rise and fall of Earth's waters on its coastlines |
| What causes tides? | the interaction of the Earth, the moon, and the sun |
| gravity | the force put on an object that pulls other objects toward it - gravity keeps us on the Earth |
| What produces the phases of the moon? | A regular cycle in the Earth-moon system called the Lunar Cycle |
| How many days is the Lunar Cycle? | 29.5 days |
| Lunar Cycle | regular cycle in the Earth-moon system - Produces phases of the moon - takes 29.5 days |
| neap tide | the tide with the LEAST difference between low and high tide - happens when the sun and moon pull at right angles to each other |
| full moon | when the moon's Earth-facing side is completely lit by the sun |
| spring tide | tide with the GREATEST difference between low and high tide - happens when the sun and moon are aligned with the Earth |
| tidal power | a useful part of an overall plan to generate electricity |
