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Warm currents bring warm temperatures to the poles, and cold currents bring cold temperatures to the equator to become warm again. Once warm, they return to the poles again. This process repeats in some currents forever. Most currents are circular.
If you look at a map of ocean currents, you'll note that water does not remain in one place. That is, it doesn't go to the equator and remain there. Ocean surface currents tend to swirl, so upon reaching the equator, the currents will bring the waters in a full circle and repeat the process. Additionally, water has a tendency to evaporate, even frozen water--ask the Inuit what a Chinook is (hint: it isn't a fish, or a large, flying brick the US Army uses for troop and equipment transport). Also, ocean currents move in many different directions, the ocean being a three dimensional space, some of the water moves to different levels.
The flow of mantle effects convection currents in the mantle. This process happens as hot material within the mantle begins to rise. As it rises, it begins to cool and then sinks. This process repeats as a cycle of convection currents.
convection currents and heat transfer
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by convection
Warm currents bring warm temperatures to the poles, and cold currents bring cold temperatures to the equator to become warm again. Once warm, they return to the poles again. This process repeats in some currents forever. Most currents are circular.
If you look at a map of ocean currents, you'll note that water does not remain in one place. That is, it doesn't go to the equator and remain there. Ocean surface currents tend to swirl, so upon reaching the equator, the currents will bring the waters in a full circle and repeat the process. Additionally, water has a tendency to evaporate, even frozen water--ask the Inuit what a Chinook is (hint: it isn't a fish, or a large, flying brick the US Army uses for troop and equipment transport). Also, ocean currents move in many different directions, the ocean being a three dimensional space, some of the water moves to different levels.
The flow of mantle effects convection currents in the mantle. This process happens as hot material within the mantle begins to rise. As it rises, it begins to cool and then sinks. This process repeats as a cycle of convection currents.
convection currents
convection currents
convection
It's the change (decrease) in density with heating that produces the currents that we refer to as convection currents.
Convection is the process that causes warm air to rise and cold air to sink. As such, the winds caused by this process are called convection currents.
convection currents and heat transfer
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You can mix anything you want in a jam. As long as it has been properly cooked in a jam process.