Brianna Stokes

a mountain made mostly up mostly of rock layers folded by being squeezed together

a mountain made by huge tilted blocks of rocks separated from surrounding rocks by faults

the breaking down of rocks into smaller pieces by natural processes

the picking up and removal of rock particles

a mixture of weathered rock, decayed plant and animal matter, living things, air, and water

material in soil formed by the breakdown of plant of and animals

any of the layers of soil from the surface to the bedrock below

water that soaks into soil and rock by colecting in spaces between rock particles

the downhill movement of Earth material caused by gravity

the dropping off of sediment

a huge sheet of ice and snow that moves slowly over the land

a jumble of many sizes of sediment deposited by a glacier

a deposit of many sizes of sediment in front of or along the sides of a glacier

a naturally occurring solid in Earth's crust with a definite structure and composition 

a rock that forms when hot, liquid lava cools and hardens into a solid

a rock that forms from pieces of other rocks that are squeezed cemented together

a rock that forms from another kind of rock that is changed by heat, pressure, or chemical reaction

rocks coninually changing from one kind into another

the idea that in a series of rock layers, the bottom layer is the oldest and the top layer is the youngest

the age of a rock as compared with another rock

a listing of Earth's rock layers in order from oldest to youngest

any trace, imprint, or remains of a living thing preserved in Earth's crust

the ramains of a living thing that was widespread but lived for only a short part of Earth's history

the time it takes for half the mass of a radioactive element in a rock to break apart

the age of a rock in years, as determined by measuring the decay rate 

one of the four long stretches of time in Earth's history