Answer:
Explanation:
Weathering is a natural process of break down of rocks or minerals into sub-parts, sediments and others. The two broad categories of weathering which are responsible for breaking down of rock/minerals are:
1. Physical and mechanical weathering: It refers to the process by which the rocks are broken down into sub-parts. This process does not alter the chemical composition of the rocks. The agents such as temperature, pressure, and others.
2. Chemical weathering: It refers to the process by which the rocks are subjected to chemical treatment such as hydrolysis, oxidation, and carbonation. These treatments brings change in the chemical composition of the rocks which further causes the disintegration of rocks.
The melting temperature of materials is affected by the pressure they are under. So when "rock" in the Earth's mantle experiences a decrease in confining pressure, not only does it expand, it's melting temperature drops. If the melting temperature of the material drops below the background (also known as the
in-situ
) temperature, then melting will occur and in this case magma will form.
The doppler effect occurs for all types of waves
1 and 2 because its nature
