<span>Chemical
rocks are formed when minerals and water precipitate. Examples of these rocks
are limestones and rock salt. Chemical rocks can be dissolved into water.
Chemical rocks have different types and these are the following: Carbonate
rocks, Chert and Evaporite rocks.</span>
A hill is a landform that extends above the surrounding terrain. Generally, mountains are higher than 2000 ft. In any other natural elevation like atmosphere, as you go higher and higher, the temperature drops down and the climate becomes colder.
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Explanation: At latitude 0° (the Equator) day length will be approximately 12 hours. Areas on the Equator have a constant 12 hours of daylight all year round. As latitude increases to 80° (polar circles - north or south), day length can be seen to increase to 24 hours or decrease to zero (depending on the time of year).