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10 Cards in this Set
- Front
- Back
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Convection |
Heat transferred within fluids due to the changes in density when liquids and gases warm or cool. |
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Convection currents |
Circular motion of fluids that happen when a fluid is heated on one side and cold on another. |
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Global wind belts |
The motion of the atmosphere due to the combination of convection currents and the rotating of the earth, this is the Coriolis effect. |
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How does a convection current work? |
heat is carried by a fluid to a new location. It works when the bottom of the fluid is warmer than the top of it. The warm fluid at the bottom becomes less dense because the particles in it move away from each other, warm less dense fluid rises. When the one fluid reaches the top and it cannot move any further, it will turn to the sides. Because the area at the top is colder, the warm fluid will eventually lose its heat, transferring it to the cooler fluid. The fluid will become dense and sink. When the cooler, more dense fluid hits the bottom, it can not move anywhere else, so it moves off to the side. The area that is warm pulls the fluid in from around it and the cycle is completed. |
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Describe how the global wind belts occur |
There are 6 convection currents on planet earth. In these convection currents, they move the air on the surface of the earth. Moving air is called wind. The wind will either travel north or south depending on the direction of the convection current |
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The beaches on the Long Lsland Sound in Milford, CT get less snow than north Milford, CT nearly every snowstorm. They are only 8 miles apart. Explain why |
-During the winter, the oceans are still warm, because water takes a long time to cool down, so the air near the ocean is warmer - during the winter, the land is colder than the oceans because land cools quickly. So the air over the land is colder - it will snow where it is colder and rain where it is warmer |
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Explain what causes ocean currents to move |
-Global winds push the water around, so the surface of the oceans move |
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Northwestern Europe and Canada are, at the same latitude. Explain why Northwestern Europe often has warmer temperatures than Canada does. |
- Cananda does not have an ocean current of warm water flowing towards it. In fact, cool polar water is flowing on both sides of Canada, cooling it down. |
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Explain why the equator gets lots of precipitation while the poles get a little precipitation |
- the atmosphere's convection currents create bands of high and low pressure around the earth. High pressure means air is sinking and therefore brings clear weather. Low pressure means air is rising and therefor water vapor in it will condense as it cools in the upper atmosphere - air at the equator is warmed and rises. as warm air rises it carries water vapor with it. When the water vapor cools, it condenses into clouds. If the clouds become filled with enough water drops, then it will rain. Remember that low pressure causes lousy rainy weather. - air at the poles is cold and sinks. Sinking air causes high pressure. If a cloud happens to be in the sky, as it sinks, it will warm and the water will evaporate into invisible water vapor. There will be no clouds in the sky and it will not rain. |
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Explain how a rubber ducky released off the shore of Japan could be found in CT 13 years later. |
The rubber ducky would have floated around the globe on the ocean's currents. The currents don't move very fast, so it would take a long time and a lot of luck for the ducky to arrive on the shore on the other side of the World. |
