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26 Cards in this Set
- Front
- Back
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Earth science |
Uses observation and experimentation to discover the causes of natural events |
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Geology |
Study of origin and history and structure of earth |
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Oceanography |
Study of earths oceans |
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Meteorology |
Study of earths atmosphere |
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Astronomy |
Study of universe beyond earth |
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Environmental science |
Study of the way humans interact with their environment. |
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Measurement |
Is the comparison of some aspects of an object or event with a standard unit |
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Interdisciplinary science |
The exchange of ideas between fields of science supports scientific evidence |
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Innercore |
Hot as the surface of the sun |
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Outercore |
Not hot as the innercore |
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Mantle |
Not as hot as the core, largest layer |
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Crust |
Cool, what we live on, divided into segments called plates |
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Pangea |
Supercontinent that existed 250 million years ago, discovered by alfred wegner |
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Rock cycle |
Sequence of events involving the formation, alteration, destruction and reformation of rocks as result of natural process |
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Igneous rocks |
Are formed by magma and lava as it cools. Form in two different ways |
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Sedimentary rocks |
Made when sediments are pressed together over time and become a rock formed in layers |
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Metamorphic rock |
Are made from other rocks heat and pressure help change an igneous or sedimentary rock into a new kind of rock |
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Crystal |
Are different atoms that are formed in a pattern |
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Grains |
Smaller pieces of rock or sediment |
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Volcano |
Is a vent ot chimney that connects molten rocks (magma) from within the earth's surface |
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Explosive eruptions |
Erupt 10-1000km of magma, send ash clouds 25 km into the stratosphere |
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Effusive eruptions |
Are characterised by outpourings of lava onto the ground |
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Why do volcanoes errupt? |
Magma is bouyant has a lower density than the sorrounding rocks and will rise up through the crust to errupt on the surface |
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Seismicity |
Earthquake activity commonly precedes an erruption (measured by seismograph) |
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Deformation |
Tilt meters are used to measure the deformation of the volcano |
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Gas monitoring |
Gas output from a volcano increases or changes composition before an eruption |
