Our Planet, Earth

_________ is a point at which, everywhere on Earth, days and nights are nearly equal in length.

is the breaking down or dissolving of rocks and minerals on Earths surface. Once a rock has been broken down, a process called erosion transports the bits of rock and minerals away. Water, acids, salt, plants, animals, and changes in temperature are all agents of weathering and erosion.

is the process of deposition, or dropping, eroded material, Plains, or large areas of flat or gently rolling land, are often formed by the deposition of material carried downstream, by rivers.

When plates slide against each other, earth-quakes occur. They often occur at seams in Eath's crush called______________

Soil is required to __________ plants and animals life and for agriculture.

__________is a point at which days are longest in one hemisphere and shortest in the other.