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Chapter 8
science
Question | Answer |
---|---|
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 |