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Chapter 8


fold mountain a mountain that keeps building on itself
Fault block mountaion a mountaion that is o a fault and twists and curves
Weathering The rocks being broken down by erosion
erosion the weather such as water wind and lava breaking down rocks
soil the top layer of the crust filled with nutrients and groundwater
Humus a moving of the grounds crust
Soil horizion any layers of rock beneath the earths crust
Groundwater Water that gets there when soil soaks up water from rainfalls
Mass wasting The downhill movement caused byearths material of crust
Deposition The dropping off of sediment
Glacier A huge sheet of ice and snow
Till A jumble of many sizes of sediment deposited by a glacier
Moraine A deposit of many sizes of sediment being moved by a glacier
Mineral Any kind of hardened substance formed underground
Igneous rock A rock that forms when hot liquid magma cools
Sedimentary rock A rock that forms from different sediments built up
Metamorphic rock A rock that forms from another rock hardening on it
Rock cycle the cycle from magma to rock to magma
Superposition The idea that a series of rock the bottom layer is the oldest and the topmost is newer
Relative age The age of a rock as compared with another rock
Geologic colloumm A listing of earths rock layers from youngest to oldest
Fossil Any trace imrint or remains of any organism
Index Fossil The remains of a fossil that was widespread but lived for only a short part of earths history
Half-Life The time it takes for half the mass of a radioactive element in a rock to break apart or decay
Absolute age The age of a rock in years as determined by measuring its time to breakdown its radioactive elements
Era One of the four long stretches of time in Earth's history:From the earliest Precambrian through the Paleozoic era and Mesozoic eras to the current Cenozoic
Created by: Katlover