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Science Unit C cha4
| Question | Answer |
|---|---|
| a wall of rocks built out into the ocean | jetty |
| up and down movement of surface water | wave |
| repeated rise and fall of the level in the ocean | tide |
| stream of water that flows like a river through the ocean | current |
| self-contained underwater breathing apparatus | scuba |
| area where ocean and land meet | shore |
| small underwater vehicle | submersible |
| rocky point along a shore | headland |
| pool of sea water found along a rocky shoreline | tide pool |
| removal of salt from sea water | desalination |
| sound waves that can be used to map the ocean floor | sonar |
| weight of water pressing on an object | water pressure |
| percent of salt in ocean water | salinity |
| Why do waves form? | wind blows over the surface of the water |
| What does Earth's rotation cause currents to do? | to bend to the right in the Northern Hemisphere and the left in the Southern Hemisphere |
| What causes deep-ocean currents? | differences in water temperature |
| What causes tides? | the pull of gravity of the sun and moon on the earth's waters |
| Which submersible discovered the presence of vents along the mid-Atlantic ridge? | Alvin |
| Which submersible studied the sunken remains of the Titanic | Nautile |
| What does a rip current do? | flows away from the beach |
| When all soft rock is washed away by waves, the rocky point that remains is called a | headland |
| What is used to map the ocean floor? | sonar |
| Why does a tsunami gain strength as it reaches the shore? | friction with the ocean bottom slows the wave as it approaches the shore, causing it to grow |
| Where does salinity of ocean water come from? | minerals weathered from earth's crust |
| How does water in a wave move? | in a circle |
| As you go deeper in the ocean what happens to water pressure? | it becomes greater |
| desalination is | removal of salt from ocean water |
| Name resources that can be found in the ocean | salt, fish, shellfish, sea plants, copper, iron, nickel, cobalt |
| Be familiar with The Cape Hatteras light house and the erosion issues it's gone through. What solution could fix the erosion problem? | The jetties have not helped. The lighthouse might have to be moved. |
| When are tides higher during a full moon or half moon? | neither, explain your answer. |
Created by:
mandygarola
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