can someone me with these earth science questions?

Here are your answers, hope they help!

Explanation:

Mechanical weathering is the breaking down of substances, often rocks, into smaller pieces. There is no molecular change. In chemical weathering, molecular change occurs. Molecular change means that a few of the atoms that create the molecule could become unattached and separate; and some new atoms might be introduced into the mixture during this process. If mechanical weathering is the physical breaking down of a substance, and it breaks down into single molecules(remember, this doesn't change the molecule itself), the single molecules could join with other molecules and make new substances.

A slump is exactly what it sounds like: a large vertical slab of land that "slumps" and sags under the force of gravity. A slump does not move at quick speeds like a landslide. A landslide is composed of chunks of rock and dirt that move downhill, often at high speeds. The landslide often starts from a pile of loose dirt. It also can start when a mountain with partially solid rock formations undergoes an earthquake and rock pieces are shaken free of the loose formations. The image I've included shows the difference.

what's the rest of the question

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion