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Earths Crust
Chapter 7-9
| Question | Answer |
|---|---|
| biological weathering | When living things cause chemical or mechanical weathering |
| magma | Hot moulded rock under the earths surface |
| igneous rock | rock that forms from the hardening of magma |
| Intrusive rock | magma cools underground |
| Extrusive rock | lava cools on the earths surface |
| lava | magma which is forced out of the earths surface |
| sediment | rock particles |
| sedimentary rock | rock that is made up from sediment |
| chemical weathering | weathering which is caused by a chemical reaction |
| mechanical weathering | weathering which is caused by a physical force |
| metamorphic rock | rock which is formed under the earths surface, and is made from years for compacted rock |
| fossils | impressions of remains of an organism that were covered by sediment when they died |
| fossil record | informations we have from fossils |
| geological time scale | A time scale that shows the changes of life on earth |
| Ice wedging | cracks in rocks that are formed water getting into a rock and then freezing. Then in puts pressure on rock causing rock crack to widen |
| Erosion | The movement of weathered rock materials |
| Deposition | Laying down of sediment |
| Valley | a low region of land between hills and mountains |
| Plains | A level area of land |
| Delta | When sediment builds up and causes the river to increase in size and fan out |
| Fiords | A long narrow inlet of sea |
| Rock cycle | A cycle which rocks got through and many stages of different rock |
| 4 layers of the Earth | Crust, mantle outer core, inner core |
| Crust | the outer layer of the Earth |
| Continental crust | Parts of the earth with continents on them |
| Oceanic Crust | parts of the earth with only ocean floor on them |
| Pangaea | when all the land was one big continent- a super continent |
| Divergent boundaries | when two plates move away from each other |
| Convergent boundaries | when two plates collide |
| Subduction zone | An area in earths crust when a plate is sinking below another |
| Mountains | A land mass that rises from the surrounding level of earth |
| Plateaus | A large area of raised ground |
| Transform fault boundaries | Areas where plates get stuck while going past one another and create friction, and then one of them slips |
| Earthquakes | A vibration of earths crust where there is a sudden real ease of energy from plate movement |
| After Shocks | small tremor that occurs after an earthquake |
| seismic waves + 2 types | An Energy wave caused by an earthquake 1.)Primary-can be detected anywhere 2.)Secondary- Cannot travel in liquid |
Created by:
fry
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