GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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lower mantle and outer core
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asthenosphere and lower mantle
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outer core and inner core
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asthenosphere and outer core
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Detailed explanation-1: -The two layers of the Earth that are involved in forming convection currents are the mantle and the outer core.
Detailed explanation-2: -Mantle convection describes the movement of the mantle as it transfers heat from the white-hot core to the brittle lithosphere. The mantle is heated from below, cooled from above, and its overall temperature decreases over long periods of time.
Detailed explanation-3: -The plates move on a hot flowing mantle layer called the asthenosphere, which is several hundred kilometers thick. Heat within the asthenosphere creates convection currents (similar to the currents that can be seen in the lava lamp).
Detailed explanation-4: -Surface heating produces convection currents in the troposphere. As the Sun’s rays warms the Earth’s surface, the air near surface absorbs heat and rises, creating convection currents. As the air rises in the troposphere, it cools, becomes denser, and sinks back toward the surface.