By: Ashton Church

made of rock layers folded by squeezing together

huge tilted blocks of rock

breaking down of rocks by natural processes

loose weathered rock

material produced by breaking down plant and animal remains

series of horizons in soil from the surface down to bedrock

rain water that soaks into the cracks in the ground

the downhill movement of Earth material caused by gravity

the dropping off of sediment

a huge sheet of ice and snow

a jumble of many sizes of sediment deposited by a glacier

a deposit of many sizes

a naturally occurring solid in Earths crust

a rock that forms from cold magma

a rock that forms from other pieces of rock

a rock that forms from another kind of rock

rocks that continually changing from one kind into another 

the bottom layer is the oldest and the top layer is the youngest

age of a rock is compared with another rock

Earth's rock layers in order from oldest to youngest

remains of a living thing in Earth's crust

remains of a living thing that didn't live for very long

the time it takes for half of the mass

the age of a rock in years

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