|Earth and Space Science||Oceanography 5M2.00||Unifying Concepts of Science||Scale and Model 2.1 e|
Sponsored by the National Science Foundation
CONTENT STANDARD: Earth and Space Science
CONTENT TOPIC: Oceanography
CONCEPT: The topography of the ocean floor is in constant change.
CONTENT OBJECTIVE: 5M2.00 To understand the changes which occur in the oceans and their effect on the earth
INSTRUCTIONAL OBJECTIVE: The learner will:
TN COMPONENT OF SCIENCE: Unifying Concepts of Science
BENCHMARK: Changes made to models represent how real objects or processes are affected by change.
Varying amounts of salt in different parts of the ocean can also cause deep ocean current. Look at the map we have here. This line in the center of the earth is the equator. The winds blow east to west as they blow TOWARD the equator. These winds are called TRADE WINDS. (On the world map draw red arrows, pointing away from the equator and east.) Winds that blow AWAY from the equator move from east to west.
(On the world map draw blue arrows pointing away from the equator and west) The winds are called WESTERLIES. These winds push the water as they go and cause the currents. Scientists are still studying the effects of currents on the earth.
Wind also causes waves. The wind pushes against the surface of the water causing waves. The tallest part of a wave is called the CREST. When the crest of a wave tumbles into foam, a breaker forms. Breakers carry sand away from the beach. After many years, the force of waves can change the shape of a shoreline.
Place moist sand in one end of a large cake pan. Put about an inch of water in the other end of the pan. Gently rock the pan to simulate wave action as the water strikes the sand. Observe what happened during the experiment. Take out about half of the water to simulate a falling tide and repeat the process.)
Today we have used a model to show how changes affect the ocean. Write paragraph about the model we used. Tell what each component in our model represented in oceans and tell what the change we made represented. Tell the results of the change in our model and compare these with the results in the real world.
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