Rocks and Soil

Weathering, Erosion, Deposition Weathering / Erosion / Deposition weathering the break down of rocks erosion when broken down rock is moved by some force of nature deposition when rock sediments are dropped down in a new location Types of Weathering Physical Weathering plants wind water (freezing, moving) glaciers Chemical Weathering acid rain oxidation carbon dioxide Rocks and Minerals composition the chemical makeup (what it is made of) texture refers to the size, shape, and positions of the grains organic living or alive at one time inorganic not living and never was rock A naturally occurring, solid mixture of minerals & organic matter. mineral a naturally occurring inorganic solid, with a definite chemical composition, and a definite crystal structure. 3 Types of Rocks and the Rock Cycle Types of Rocks Sort Sedimentary made from rocks that have been weathered forms when sand and sediments are pressed tightly and cemented together often contain fossils Igneous formed when magma or lava cools often found near volcanoes and mid-ocean ridges Metamorphic often form deep in the earth formed from extreme heat and pressure rocks that are morphed or changed to a different kind of rock Label the rock types. metamorphic sedimentary magma igneous sediments sediments sedimentary metamorphic magma igneous Introduction to Soil (watch first 4 minutes and 45 seconds) What is the main ingredient in soil? weathered rock air water organic matter What is humus? the air inside of soil middle eastern dip for pita the organic part of soil Which of the following is NOT a decomposer that helps break organic matter down? bacteria fungi vultures invertebrates Which soil type has the smallest size grains? clay silt sand loam Which soil type has the largest size grains? clay silt sand loam Which type of soil is the best for plants? clay silt sand loam Which type of soil would allow water to pass through the fastest? clay silt sand loam Which type of soil holds the most water? clay silt sand loam