This study sheet went home with students on Tuesday. Study! Study! Study!
Soil - Soil is made up of water, air, weathered rocks, and decaying organic material. The four main types of soil are loam, clay, humus, and sand.
Sand - Sand is made up of weathered rocks and is mostly light colored. Grains of sand are crystal shaped. These crystaline shaped gains allow water to pass trough it quickly. This soil also holds more air than the other soils, which makes it the dryest soil.
Clay - Clay is made up of fine grains and is very moist. Clay can have many colors. It holds a lot of water and little air.
Humus - Humus is made of decaying plants and animlas. It is the darkest colored soil and it is rich in minerals. Humus has a rotton odor.
Loam - Loam is a mixture of sand, clay, and humus combined together. Loam is the best soil to grow plants. Loam is a dark brown color.
Rock Cycle - In the rock cycle rocks are constantly being formed, worn down and then formed again. There are three main types of rocks that are formed in the rock cycle; igneouse, metamorphic, and sedimentary.
Igniouse Rock - Igneous rocks form when molten lava (magma) cools and turn to solid rock.
Metamorphic Rock - When the earth's crust moves, it causes rocks to get squeezed so hard that the heat causes the rock to change. Metamorphic rocks are rocks that have been formed by great heat or pressure.
Sedimentary Rock - When erosion occurs, little bits of rock are worn away and get deposited as sediments. Over time, the sediments build up forming heavy layers. The sediments are eventually cemented together by the pressure, forming sedimentary rocks.
Minerals - A mineral is a natural occuring inorganic solid with a crystal like shape and structure. Minerals are classified by their streak (color), clevage (shape/structure), and their hardness. Minerals cannot be man made.
