A constructive force creates or builds something on the earth. For instance, volcanoes are built up by constructive tectonic plate movement. Destructive forces like tornadoes and tsunamis tear down or wear away parts of the earth.Continue Reading
Tornadoes, hurricanes, volcanoes, tsunamis, and earthquakes are all examples of destructive forces. The Grand Canyon is a result of destructive force. It was carved by water, which is one of the three agents of erosion. Erosion is a natural destructive process in which rock, soil or sediment is displaced or worn away. The other two agents of erosion are wind and ice. Ice erodes in the form of glaciers, forming valleys, and moraines. The third agent of erosion, wind, carries grains of sand that wear away at rocks.
Destructive forces can also be constructive. For example, as wind carries sand away from one region, it moves it to another and constructs sand dunes. Likewise, water forms deltas by depositing sediment at the mouth of a body of water.
The movement of tectonic plates can be constructive, forming volcanoes as plates converge or diverge. Iceland was formed, for example, by moving plates. Volcanoes are a destructive force because their eruptions destroy trees and other landmarks, but the magma they produce can be constructive as it dries on land to form mountains. Tectonic plate movement can cause earthquakes, which is another example of a destructive force that breaks apart land. Often, earthquakes and volcanic eruptions occur simultaneously as the result of plate tectonics.Learn more about Earth Science
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Scientists agree that the Earth formed about 4.6 billion years ago out of accreted matter from the solar nebula. All planets in the solar system formed the same way. Once the proto-Earth was formed, many changes occurred over vast timescales to produce the Earth of the 21st century.Full Answer >
According to scientists, the earth is about 4.5 billion years old. However, because of the constant upheavals in climate, plate tectonics, asteroid strikes and other events, most of the evidence of the earth's beginnings are lost.Full Answer >
While no one knows for certain how the Earth formed, scientists theorize that it formed over 4 million years ago after the sun went through its initial formation, gravity began to draw heavy particles together into a planet and solar winds blew away lighter gases. These heavy particles became the core of the planet. As the mass continued to grow, heavier particles sank to the center, according to Space.com.Full Answer >