Fill another small container with hot water.Fill a small container with very cold water.Allow the water to stand about 5 minutes. Fill each plastic cup with 6 ounces (200 ml) of water.Discuss or review the concept of density relative to temperature.Small aquarium, water immersion heater, blue ice cubes, red food color, medicine dropper, small paper cup, tape clear plastic cups, 2 medicine droppers, blue and red food color, small containers for ice water and hot water, ice, hot water, room-temperature water Per student or pair of students: three 8 oz. Inside Earth, the convection of mantle material is thought to cause the movement of the overriding crustal plates, resulting in events such as earthquakes and volcanic eruptions. Winds, in turn, create surface waves on the ocean.Ĭonvection also plays a role in the movement of deep ocean waters and contributes to oceanic currents. Along with the turning of the Earth, this movement of air creates winds. In the atmosphere, as air warms it rises, allowing cooler air to flow in underneath. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. To observe convection as a result of differential heatingĬonvection currents are the result of differential heating. Deep, cold-water currents play an important role in creating the ocean oasis of the film.Ĭonvection currents play a role in the circulation of fluids. In the ocean, warm water is normally found near the surface while the deeper water is usually cold. It is thought that this type of current is responsible for the movements of the plates of Earth's crust. Heated mantle material is shown rising from deep inside the mantle, while cooler mantle material sinks, creating a convection current. Convection currents are identified in Earth's mantle.
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