Answer:
Explanation:Economists and statisticians use several methods to track economic growth. The most well-known and frequently tracked is the gross domestic product (GDP).
Answer:
Beach Drift
Explanation:
The movement of water within the surf zone that parallels the shore is called beach drift.
<span>ore
An ore is a type of mineral or rock which has a high enough concentration of a desirable element such that it's economical to extract that desired element. This means that the actual concentration of metal in an ore varies quite dramatically depending upon the metal. For instance, Bauxite, which is the ore for aluminum contains approximately 15% to 25% aluminum. But for gold, it's not uncommon to profitably extract 1 ounce of gold from several tons of rock.</span>
Answer:
fresh-water, salt-water
Animals
Explanation:
Sponges are the simplest and most primitive animals on earth. They are found in continental water bodies, where 98% of the population are found in salt-water and the remainder in fresh-water.
They have little or no defined organs and movement is hardly noticed in adult sponges, feed by filtration, and have a rather flexible skeletal structure.
Answer:
Heat from the mantle forms convection currents causing the tectonic plates to diverge and form ocean basins.
Explanation:
Ocean basins form as a result of convection in the mantle along divergent margins.
- At a divergent margin, new crusts are being formed.
- It is said to be a constructive margin because new materials reaches through to the earth surface from there.
- The mantle convection pushes materials up and down away from heating centers and to cold regions and back and forth.
- This leads to the creation of cells which moves the overlying plate.
- The mantle materials are then able to reach the surface to form new ocean basin.
