Coal is the best answer. Coal is primarily used in generating electricity. It is also a good source of raw materials for making heating oils, chemicals and medicines. Bauxite on the other hand is the mineral ore of aluminum which is used in the manufacture of cans, airplanes, sporting and electronic equipment and home appliances. Halite is commonly recognized as salt and is used in human and animal diet, food seasoning and food preservation. Lastly, limestone <span>is used as dimension stone in buildings and as a component of </span>cement.
It is for sure not A. I think it's C.
Answer:
Neptune, the eighth and farthest planet from the sun, has the strongest winds in the solar system. At high altitudes speeds can exceed 1,100 mph. That is 1.5 times faster than the speed of sound.
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Biological weathering is caused by living organisms, such as microbes, animals, and plants. Water, oxygen, and rocks are nonliving things (though water and rocks may be capable of weathering), and only plant roots fits the definition of biological weathering. So the correct answer for #1 is A.
Frost wedging occurs when the little water content in rock freezes, expanding and forcing the rock apart. Eventually, enough freeze-melt cycles causes the rock to break apart little by little. This is due to ice's density being less than that of water, meaning that it is because water expands when frozen. So the answer to #2 is A.