the path one object makes as it revolves around another

Shapes and types of land

thin layer of rocks and minerals that surrounds Earth's mantle

a process that breaks rocks down into tiny pieces

a sphere of very hot metal at the center of Earth

Complete journey, around the sun

Stretches of low land between mountains or hills

block of rock and soil that makes up Earth's crust

a process in which water, ice, or wind remove small pieces of rock

a thick, rocky layer around the Earth's core

Each complete turn of Earth

Large areas of flat or gently rolling land

seams in Earth's crust

the process of depositing material eroded and carried by water, ice, or wind

streams of molten, nearly melted, rock

Areas sharing the same time

Flat plain built on the seabed where a river fans out and deposits material

theory that explains that huge blocks make up Earth's crust

part of Earth's structure, this is a thick layer of gases or air

seams in Earth's crust

A point at which, everywhere on Earth, days and nights are nearly equal in length

a large, mostly flat area that rises above the surrounding land

when plates slide against each other, this is the result

forces within the Earth create these and forces on Earth's surface wear them down

built up pressure inside Earth sometimes forces magma up through Earth's crust, forming this