When mantle rocks near the radioactive core are heated, they become less dense than the cooler, upper mantle rocks. These warmer
rocks rise, while the cooler rocks sink. This movement of warmer and cooler mantle rocks creates pockets of circulation within the mantle called _________, which are thought to be the force behind the movement of tectonic plates over the asthenosphere. A) magma flows
B) density cells
C) convection cells (currents)
D) conduction points
This is similar to the convection currents of all fluids. The mantle is semi-plastic – meaning the rocks are hot enough to melt but remain ‘solid’due to the enormous pressure in the region. The currents are slow and though frictional drag they cause movement of tectonic plates of the crust above as they churn.
Answer:If the temperature is high, the body sweats in order to cool down. Since the process of sweating is done to stop the temperature change, this is a negative feedback. Feedback loops come in two flavors: positive and negative. A negative feedback loop reduces the effect of change and helps maintain balance.
The largest circles are Cyclones. Together, they account for about 300000 deaths. The one that was the most was the one in Indonesia but it it is not a choice. The next largest one is the one in 1991 in Bangladesh, in 1991.
