GACE Middle Grades Science Latest Update with Verified Answers

GACE Middle Grades Science Latest Update with Verified Answers tidal hypothesis Theory that the solar system started with a near collision of sun and large star. Few astronomers believe this theory. condensation hypothesis solar system began with rotating clouds of dust and gas. Condensation happened in center to form sun, and smaller parts of clouds formed. More astronomers believe in this idea. Core Outer core- liquid; inner core- solid. Very dense in center. Believed that core is 80% iron. Helps heat oceans. Mantle Surrounds core. Semi-solid/plastic and the viscosity varies as pressures and temps. change at different depths. Crust Outermost layer of the Earth. Least dense layer. Sedimentary rocks forms when sediment collects and hardens; layers of sediment pile up and squeeze together; requires pressure Igneous rocks rocks formed by the cooling of molten rock (either magma or lava) Metamorphic rocks Rocks formed when other rocks are put under extreme heat and pressure Foliated rocks metamorphic rocks with crystals arranged in parallel layers or bands Unfoliated rocks metamorphic rocks that are NOT layered Characteristics of minerals non-living, formed in nature, solid in form, their atoms forming a crystalline pattern, and its chemical composition is fixed within narrow limits Soils fine material covering the earth's surface composed of both mineral & organic material; dirt Sandy soils gritty, loose, water passes through rapidly Clay soils smooth and greasy, are moist and do not let water through easily Loamy soils Velvety, particles clump together, holds some water, but some can pass through Pedalfers reddish soils/Aluminum and iron (Alfers) Al and Fe rust and turn red clay. Georgia. Rich in iron. Pedocals found in grasslands and brush in WESTERN north america, rich in calcium carbonate, gray-tan-white, dry and temperate Laterites redish-orange soils that develop in hot, wet tropical climates, and are not good for farming Orogeny natural mountain building Folded mountains When rock layers are squeezed together and pushed upward. The Himalayas (formed when India collided with Asia), Mt. Everest