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6.9B Tides
| Question | Answer |
|---|---|
| gravity | the attractive force that exists between all objects |
| high tide | the highest level of water on the shore; it occurs twice daily in most coastal areas |
| low tide | the lowest level of water on the shore; it occurs twice daily in most coastal areas |
| neap tide | a tide that occurs during the first and third quarter moon phases when there is the least difference between high and low tides; it causes low-high tides and high-low tides |
| spring tide | a tide that occurs during the new and full moon phases when there is the greatest difference between high and low tides; it causes high-high tides and low-low tides |
| tidal bulge | the movement of Earth's ocean waters to the sides of the Earth facing toward and away from the Moon, causing a rise in ocean levels in these areas due to gravitational pull from the Moon; it's the cause of high tides in these areas and low tides on the si |
| tide | the rise and fall of seawater twice daily on most coasts, caused primarily by the Moon's gravitational pull and Earth's rotation. |
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