5th grade oceans
Terms
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- what is a wave
- it is the up and down movement of surface water
- what causes waves
-
1. wind
2. earthquakes
3. volcanoes
4. extremely low air pressure - what determines how tall the wave is (height)
- it depends on how hard the wind blows
- what causes some of the biggest waves
-
1. earthquakes
2. volcanoes - what is a tsunami
- it is a giant wave caused by an earthquake or a volcano
- what slows down the wave when it gets to shore
- friction with the ocean bottom slows down the wave
- what is a storm surge
- it is a bunch of huge waves that come ashore during a hurricane
- what is a rogue wave
- it is a wave that forms when large storm waves join together
- what is a current
- it is a stream of water that flows like a river through the ocean
- what is a surface current
- it is current that flows across the surface of the ocean
- what causes surface currents
- this is caused by prevailing winds
- what is the gulf stream
- it is the warm current that flows from the Caribbean, past the east coast of the united states and across the north atlantic ocean
- why can palm trees grown along the southern coast of England?
- the Gulf Stream allows this to happen
- what is a shoreline current
- these are local currents that run along the coast
- what is a rip current
- this is a strong current that flows away from the beach
- if you get caught in a rip current, what is the best thing to do
- you must swim parallel to the shore until you are out of this type of current
- what is a longshore current
- this is a current that allows waves to strike the shore at an angle. this type of current can also "erode" and "deposit" the beach somewhere else
- what causes the currents to bend to the right in the northern hemisphere and to the left in southern hemisphere
- the earth's rotation causes this
- what causes deep ocean currents
- this is caused by differences in water temperature deep in the ocean
- what is it called when ocean waters rise and fall twice a day
- high tide and low tide
- what causes high tide and low tide
- the sun and the moon cause these types of tides
- what is the shore
- this is the area where the ocean and land meet and interact
- how do waves change the shoreline
-
1. weathering
2. water pressure
3. chemical weathering because saltwater is a weak acid.
4. ocean currents - which type of rock erodes faster--hard or soft
- soft rock
- what is a headland
- this is the hard rock left behind after the soft rock has weathered and eroded. it may look like a rocky point
- what is a tide pool
- this is a pool of seawater found along a rocky shoreline
- how are sea caves made
- sometimes headlands erode tho form this
- what is a jetty
- this is wall like structure made of rocks that sticks out into the ocean. it is supposed to protect the beach by trapping sand
- how much of earth is covered by water
- 70%
- what technologies do scientists use to explore the ocean
- scientists use sonar, submersibles, and scuba gear to do this
- what is a submersible
- this is a type of small underwater vehicle that helps scientists to study the ocean
- what is sonar
- this is a device that uses sound waves to map the ocean floor
- what does desalination mean
- this is where you remove salt from seawater