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11 Cards in this Set
- Front
- Back
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sedimentary rock (what it is, where it can occur, example)
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formed as sediment builds up and is compressed; this can occur at a subduction zone where ocean sediments are pushed deep into the Earth and compressed by the weight of rock above it. ex: limestone
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metamorphic rock (what it is, where it can occur, example)
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formed as a great deal of pressure and heat is applied to rock. This can happen as sedimentary rocks sink deeper into the Earth they are heated by the high temperatures found in Earth's mantle.
example: slate |
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igneous rock (how it is formed, example)
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results when rock is melted (by heat and pressure below the crust) into a liquid and then resolidifies. The molten rock (magma) comes to the surface of the earth, and when it emerges it is called lava. Solid lava = igneous rock. example: basalt
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The Rock Cycle (think of the diagram!)
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SEDIMENTS -> cementation and compaction ->SEDIMENTARY ROCK --> heat and pressure --> METAMORPHIC ROCK --> melting..magma..cooling --> IGNEOUS ROCK --> weathering and erosion --> SEDIMENTS
SEDIMENTARY ROCK --> weathering and erosion --> SEDIMENTS or... SEDIMENTARY ROCK --> melting (heat and pressure = metamoprhic rock)...magma..cooling --> IGNEOUS ROCK METAMORPHIC ROCK --> weathering and erosion --> SEDIMENTARY ROCK |
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abiotic
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nonliving components of the world
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biotic
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living components of the world =]
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What takes up about half the volume of soil?
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half of its volume = mineral materials
5%= organic matter |
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Clay
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has the smallest particles; particles are less than 0.002mm in diameter
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Silt
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next largest after clay; particles are 0.002 - 0.05 mm in diameter
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sand
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coarsest; 0.05 - 2.0 mm in diameter; too large to easily stick together and have much larger pores so they can hold more water
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soil pH
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pH is a measure of the concentration of hydrogen ions and most soil lies in the pH range of 4-8. So, neutral to slightly acidic is common. Soil pH is important b/c it affects the solubility of nutrients, and determines how available the nutrients are for plant roots.
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