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science review
| Question | Answer |
|---|---|
| origin of ocean water | comets striking Earth, and water vapour released from volcanoes. |
| Ocean basin | deep wide depressions in earths surface |
| continental margins | the part of the continent that lies under the ocean. |
| tectonic process | the movement of tectonic plates |
| mid ocean ridge | underwater chain of mountains |
| how are trenches formed? | when two plates collide the denser plate is forced under the other |
| abyssal plane | flat underwater |
| what makes surface currents move | speed and direction of water and the spinning of earth on its axis |
| how does the earth spin | west to east |
| Coriolis effect | the alteration of direction |
| What makes deep currents move | water temperature and salinity |
| upwelling | the rising of water from the deep |
| swells | waves formed in open ocean |
| headlands | sections of the coastline that extend out into the ocean |
| tides | caused by gravitational attraction between the earth and moon |
| spring tide | all in straight line |
| neap tide | right angle |
| heat capacity | how long it takes for an item to heat up or cool down |
| el nino | warm ocean water off the coast ecuador and peru |