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science unit c ch4a
5th grade science unit c chapter 4 concepts
| Question | Answer |
|---|---|
| Waves form because | wind blows over the surface of the water |
| Earth's rotation causes ocean currents | to bend to the right in the Northern Hemisphere. |
| Differences in __________________ cause deep ocean currents. | water temperature |
| Tides are caused by | Earth's rotation and the gravitational pull of the moon and sun. |
| Scientists discovered the presence of vents along the mid-Atlantic ridge by using the submersible _________________. | Alvin |
| A rip current _____________________________. | flows away from the beach. |
| A headland may be all that remains when ___________________. | soft rock erodes. |
| Sonar is used to _________________. | measure the depth of the ocean. |
| When a submarine explores the ocean bottom, what type of currents affect it? | Deep ocean currents |
| Why does a tsunami pass unnoticed under ships but destroy everything when it reaches the shore? | Increased fricition with the ocean bottom decreases the speed of the wave causing it to grow. |
| The salinity of the ocean water comes from _________________. | minerals weathered from Earth's crust. |
| Water in a wave moves ______________. | in a circle. |
| The deeper you go in an ocean, _______________ the pressure becomes. | the greater |
| Resources such as __________ can be found in the ocean. | salt |
| Because of erosion, a rocky beach may become _______________. | A sandy beach |
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