| A | B |
|---|
| tide | the vertical movement of water and only goes up and down |
| current | the horizontal or sideways flow of water. It floods in which makes the tide rise and ebbs out which makes the tide fall |
| range | The vertical difference between the high and low tide water levels during one tidal cycle |
| tidal day | 24 hours and 50 minutes. The moon orbits the earth once earth month, and the earth rotates (in the same direction as the moon's orbit) on its axis once every 24 hours. |
| semi-diurnal tide | Featuring two highs and two lows each day, with minimal variation in the height of successive high or low waters. This type is more likely to occur when the moon is over the equator. |
| diurnal tide | Only a single high and a single low during each tidal day; successive high and low waters do not vary by a great deal. This tends to occur in certain areas when the moon is at its furthest from the equator. |
| mixed tide | Characterized by wide variations in heights of successive high and low waters, and by longer tidal cycles than those of the semi-diurnal cycle. These tides also tend to occur as the moon moves furthest north or south of the equator. |
| flooding current | Flooding current is experienced when the tide is rising. They move tward the beach. |
| ebbing current | Ebbing current is experienced when the tide is falling. They move away from the beach |
| rip tide | a sideways tide that is often very dangeous |
| centrifugal force | the force that tends to impel a thing or parts of a thing outward from a center of rotation |
| centripetal force | According to Newton's third law of motion, for every action there is an equal and opposite reaction. Centripetal force is the opposing force of centrifugal force |
| tidal range | the difference between levels of ocean water at high tide and low tide |
| spring tide | The largest tides. When Sun, Moon, And Earth are in approximate allignment |
| neap tide | The smallest tides. When the Sun, Moon, and Earth form a 90 degree angle |
| tide pool | Tide pools are little pools of water left by tides. They form where pools of water collect in rocky hollows at low tide. They're good for sealife because they are easier places in the ocean to survive. For example, big fish like sharks and eels cant fit in tide pools so little organisms (e.g. crabs, plankton, barnicles, starfish) won't get eaten |
