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Answers
1:There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. They accumulate in layers.
2: Coal and petroleum are formed as a result of degradation of ancient plant life which lived millions of years ago. These dead plant matter started to pile up, eventually forming a substance called peat. Over time, heat and pressure from geological processes transformed these materials into coal.
3: We should use the resources judiciously so that each and every individual gets sufficient amount of resources. Not only human beings but other organisms also need resources though not all as required by humans. Moreover, the resources are very limited as all resources are not renewable.
4: The word 'igneous' is derived from a Latin word 'ignis' meaning fire.
5: hot liquid rock that comes out of a mountain with an opening in the top (volcano)
6: used about rocks) that have been changed by heat or pressure
Fib
1: Limestone is a sedimentary rock composed largely of the mineral calcite (calcium carbonate: CaCO3). It often has variable amounts of silica in it, as well as varying amounts of clay, silt, and sand. Limestone rocks fall under the category of sedimentary rocks that are made from mineral calcite.
2: Dynamic precipitator is used in ceramics, woodworking industries.
3: the Minerals from which metal can be profitably extracted are called ores
ETT
1: A fossil fuel is a hydrocarbon-containing material formed underground from the remains of dead plants and animals that humans extract and burn to release energy for use. The main fossil fuels are coal, petroleum and natural gas, which humans extract through mining and drilling.
2: Minerals are important for your body to stay healthy. ... Minerals are also important for making enzymes and hormones. There are two kinds of minerals: macrominerals and trace minerals. You need larger amounts of macrominerals. They include calcium, phosphorus, magnesium, sodium, potassium, chloride and sulfur.
3: Magma is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites.
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