After rocks are changed by the processes of weathering and erosion they became what?

Weathering breaks down the rocks and erosion breaks rocks down even further and then moves them. Forces (i.e. wind, water, etc.) move the rock pieces. Then they mix with matter like sand to become sediment (gravel, sand, or mud carried by wind or water).

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.