Rocks and Soil. Rocks Properties of Rocks (how we categorize them) Texture Layering Color.

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Presentation transcript:

Rocks and Soil

Rocks Properties of Rocks (how we categorize them) Texture Layering Color

Texture How smooth or rough they are ence/terc/content/investigations/es0603/es 0603page02.cfmhttp:// ence/terc/content/investigations/es0603/es 0603page02.cfm

Layering szone.com/boo ks/earth_scienc e/terc/content/in vestigations/es 0610/es0610pa ge04.cfmhttp:// szone.com/boo ks/earth_scienc e/terc/content/in vestigations/es 0610/es0610pa ge04.cfm

3 types of rocks Igneous Rocks Metamorphic Rocks Sedimentary Rocks

Igneous Rocks Igneous rocks form directly from the cooling of magma. ate/igneous.htmhttp:// ate/igneous.htm

Metamorphic Rocks The metamorphic rock gets the name from "meta" (change) and "morph" (form). The rock is moved into an environment in which the minerals which make up the rock become unstable. In most cases, this involves burial which leads to a rise in temperature and pressure. tamorph.htmhttp:// tamorph.htm

Sedimentary Rocks In most places on the surface, the igneous rocks which make up the majority of the crust are covered by a thin layer of loose sediment, and the rock which is made as layers of this debris get compacted and cemented together. ate/sediment.htmhttp:// ate/sediment.htm

Rock Cycle ence/terc/content/investigations/es0602/es 0602page02.cfmhttp:// ence/terc/content/investigations/es0602/es 0602page02.cfm

Smaller rocks come from the breakdown of larger rocks through the action of plants and weathering

Soil

Composition Soil is made of: –Small rocks –Decomposed pieces of plants and animals Dead plants Dead animals –Products of plants and animals Animal waste

Properties of Soil Color –Is it dark or light? Capacity to retain water –Does it hold a lot of water? Capacity to grow plants –Does the soil have nutrients like nitrogen to help plants grow well? Texture –How does it feel?

Kind of soilHow it feelsHold shape when wet SandyFeels grittyWon’t stick together when wet SiltyFeels powderyWill stick together when wet but will not hold together after it dries ClayFeels stickyStays together when wet

Which is clay? Which is sand?

Soil is also found in layers like rocks, with topsoil on top. Each layer is called a horizon m/books/earth_science/t erc/content/investigation s/es1206/es1206page02.cfm?chapter_no=investi gationhttp:// m/books/earth_science/t erc/content/investigation s/es1206/es1206page02.cfm?chapter_no=investi gation