The convection cell in the mantle is essentially the self-sustaining, constant movement of the magma inside this layer. This works in a very simple way. The hotter magma is less dense, so it is pushed upward toward the crust above it, while the cooler magma is denser, and it moves downward where it gets hotter, and the process goes on and one. The magma that goes upward toward the crust, manages to push through the thinner and cracked crust between the plates that move away from each other, thus on the divergent plate boundaries. As the magma penetrates through the crust it manages to get to the ocean floor, thus causing volcanic activity. This magma cools of very quickly and creates new crust. Because the magma constantly rises up and creates new crust, the crust piles up and forms an underwater mountain of volcanic origin that constantly has volcanic activity because of the rising magma. This volcanic underwater mountain range is called mid-ocean ridge.
Answer:
1. There is less variation in temperature of Aquatic habitats
2. The movement of water up trees results from capillary action.
3. Provides insulation to aquatic habitats
4. Evaporative cooling
Explanation:
1. The specific heat of water is high and is characterized as measure of heat required to result in the rise in temperature of 1 g of a substance by
.
Due to this, water can limit changes in temperature thus there isn't much variation in temperature.
2. Capillary action is the motion of water inside the spaces of a permeable material because of forces of cohesion, adhesion and surface tension.
Thus Cohesion forces results in the motion of water up trees.
3. Water has one most significant property where solid structure is less dense than fluid or liquid form that protects aquatic environments. As water in its solid form is less dense, in this manner ice coasts on the lake's surface that protects the water beneath from solidifying and valuable to aquatic life forms.
4. Heat of vaporization of water is high, which is characterized as the measure of energy expected to transform 1 gram of a liquid substance to a gas at steady temperature.
Along these lines when water particles evaporates, the surface they dissipate from gets cooler, referred to as evaporative cooling.
Democracy is <span>Rule of the people
Oligarchy is </span><span>Rule by the elite few
Autocracy is </span><span>One-person rule
Repression is </span><span>Subjected to another's rule</span>
Answer:
The science that deals with the earth's physical structure and substance, its history, and the processes that act on it.