Why are farming practices like terraced fields important in terms of soil conservation?
1. They help limit the amount of soil that is produced, which is essential because soil is a renewable source.
2. They prevent soil from eroding and becoming lost, which is essential because soil is a nonrenewable source.
3. They cause nutrients in the soil to leak out, which is essential because living plants need nutrients- poor soil
4. They remove pollutants form the soil. which is essential because living things depend on pollutant- free soil
2. They prevent soil from eroding and becoming lost, which is essential because soil is a nonrenewable source.
Which statement is correct?
1. There is a thick layer of humus in cold deserts.
2. There is a thick layer of humus in dry deserts.
3. There is a thin layer of topsoil in tropical rain forests.
4. There is a thin layer of topsoil in temperate areas.
3. There is a thin layer of topsoil in tropical rain forests.
How is chemical weathering different from physical weathering?
1. Chemical weathering results in the breakdown of rock, While physical weathering does not.
2. Chemical weathering requires a reaction with water, While physical weathering does not.
3. Chemical weathering forms new substances, while physical weathering does not
4. Chemical weathering involves plants and animals, while physical weathering does not.
3. Chemical weathering forms new substances, while physical weathering does not.
Why do scientists think the Grand Canyon was once covered by an ocean?
1. The sedimentary rocks type forming layers of the canyon formed under the sea.
2. Only an ocean would have strength to erode the rock forming the Grand Canyon.
3. Seawater has been found seeping up through the canyon.
4. The Grand Canyon is located along coastlines that likely flood.