Tides
Waves
Currents
Vocabulary
Draw it
100
Tides occur because of ______________ pull
gravitational
100
A tidal wave is better known as a __________
tsunami
100
This type of current is very dangerous
rip currents
100
What do you call a disturbance that moves through or over the surface of a fluid
waves
100
Draw a spring tide
Straight line earth moon and sun
200
The earth, _________, and _________ effect the tides.
sun and moon
200
Waves are a disturbance that moves ________ or ________ the surface of a fluid.
through or over
200
Currents are "_________" of circulating water.
rivers
200
The rise and fall of the ocean's water is a _______
tide
200
draw a neap tide
moon at a right angle to the earth
300
How many times a month do spring tides occur?
2 times a month
300
Waves are mostly caused by _________
winds
300
Name 2 causes of currents
wind, rotating earth, density changes.
300
Type of tide where the moon and sun are in direct line
spring tide
300
draw a rip current
converging currents and up flow of water
400
How many low tides are there a day? How many high tides are there a day?
2 and 2
400
Name 1 way waves help to shape coastlines.
Waves erode cliffs and grind rock into sand
400
Name 2 ways you can protect yourself in a rip current
Do not fight the rip current, swim parallel to the shore, call for help, look for the signs in the water like the foam in the ocean.
400
Type of tide where the sun and moon are at right angles
neap tide
400
Draw the tidal bulge during a spring tide around earth
should be pulled on both sides
500
Name 2 reasons why tides are important
They expose and submerge organisms, they help to circulate the water, they circulate food and wastes
500
How do waves play a part in ecology?
They return oxygen to the water, and stir up food and bring it to shore.
500
Name 1 reason why currents are important
brings deep water to the surf, circulates nutrients, moves plankton and larvae
500
Type of current caused by converging longshore currents.
rip current
500
draw the tidal bulge that a neap tide causes around earth
should be even throughout
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