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7H Revision Science

7H Science Revision Rocks and Minerals Flashcard

What type of rock is Granite? Igneous Rock
What type of rock is Gneiss? Metamorphic Rock
How do you make a rock turn transparent? slice them thinly enough and use a microscope to look through them
When rocks weather because of acid rain what is this process called? Chemical Weathering
What is Biological Weathering? When plants grow in cracks of rocks, the roots grow and expands the crack then breaking it
What is Physical Weathering? When rocks clash into each other or when the desert heat expands it then at night the cold air freezes it causing it to weather slightly
Which one of these rocks weather quicker? Granite or Limestone Limestone
What are tiny pieces of rock that are drifted by rivers, lakes and streams called? Sediment
What is deposited? Sediments carried by water ir ice are dropped (deposited) when the water slows down, or when ice melts
What is the process of rocks being moved by other rocks away from their original place called? Erosion
What is Abrasion? When sediments are deposited in a river or stream the water moves them randomly which results in them bumping each other and weathering away slowly
How are Sedimentary rocks formed? when sediments are deposited onto rivers and sink under the bed of the sea and over time more layers of sediments cover it, and over time the pressure of the sediments squashing the sediments underneath froces the grains to be closer together
What is the white powder on limestones called? Calcium Carbonate
What is Cementation? if the water in the sediment contains dissolved minerals, the minerals can crystallise in the gaps as a ''glue'' that cements the grains together, Compaction and Cementation together change sediments into sedimentary rocks
What are the 3 Fossil Fuels? Coal, Oil and Natural Gases
How are Oil and Natural Gases made? when tiny sea plants and animals became buried by sediments
Created by: tnguyen17