1.how is sandstone formed?
2.list some uses of rocks and minerals.
3.which two factors are necessary for the formation of metaphoric rocks?
4.in which type of rock would you find fossils? why.?
Answers
Answer:
1. Sandstone forms from beds of sand laid down under the sea or in low-lying areas on the continents. As a bed of sand subsides into the earth's crust , usually pressed down by over-lying sediments, it is heated and compressed. ... These minerals crystallize around the sand grains and cement them together into a sandstone.
2. Buildings use: limestone for cement production, steel for beams, aluminum for desks, silica (quartz) for glass light bulbs & windows, copper wiring, sand and gravel for foundations, granite for countertops. Cars use: steel for the frame, copper for wiring, lead & lithium for batteries, silica for windows.
3. Temperature and pressure. Temperature and pressure are important factors in determining the new minerals that form in a metamorphic rock. Different minerals form under different pressure and temperature conditions.
4. Usually fossils are formed when a layer of sediment covers dead plants, animals and microorganisms. This makes sedimentary rocks like limestone and shale the best in the formation of fossils.