Mantle material rises in convection currents because heated materials become less dense.
<h3>What is convection current?</h3>
- Convection is a single- or multiphase fluid movement that develops on its own as a result of the interaction between a fluid's body forces—most frequently gravity and density—and material property heterogeneity.
- Differential heating leads to convection currents. Warm, less dense, lighter material rises while cool, more dense, heavier material sinks. When a fluid's one component is heated, the difference in temperatures causes the fluid to flow in a particular direction.
- The process of a heated fluid rising and being replaced by a cooler one is known as convection cycle.
- Convection currents use the mass motion of a fluid, such as water, air, or molten rock, to move heat from one location to another. The earth's ocean currents, atmospheric weather, and geology are all controlled by convection currents' capacity to transport heat.
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Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
Answer:
Economic Conditions. Land and climate
Explanation:
The correct answers:
<em>1. volcano located on ''volcano boulevard''.</em>
Cotopaxi is a stratovolcano on the so called ''volcano boulevard''. This volcano is located in the South American country of Ecuador, on the Andes, and in very close proximity to the capital of the country, Quito, only 50 km away.
<em>2. one of the world's largest observatories.</em>
Cerro Tololo is one of the largest observatories on the Earth. It is located in the South American country of Chile, but it is an observatory that belongs to the United States.