Carbon is the <span>element that
is responsible for the huge diversity of organic molecules, which are the compounds in the living organisms.
The
diversity of organic molecules' structures is really huge and it includes alkanes, alkenes, alkines, linear molecules, cyclic molecules, and molecules with special functional groups.
Alkanes are molecules with only single bonds between any carbons.
Alkenes have one ore more double bonds between some carbons.
Alkines have one or more triple bonds bwtween some carbons.
Cyclic molecules form close rig structures.
Molecules with functional groups include: carbon halides, alcohols, eters, amines, aldehides, ketones, carboxilic acids, esters and amides.
The huge diversity of compounds that can be made up with carbon is due to its ability to form four bonds, which permit to form chains.
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- C -
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Anay of those bonds cand be joined to many different elements, H, halogens, oxygen, nitrogen, phosphorus, sulfur, and other C, which in turn can bond to the same range of elements, and so form an infinite range of compounds.
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Answer:
Because the earth’s axis is tilted.
Explanation:
It is all about the tilt of the Earth’s axis. Many people believe that the temperature changes because the Earth is closer to the sun in summer and farther from the sun in winter. In fact, the Earth is farthest from the sun in July and is closest to the sun in January!
During the summer, the sun’s rays hit the Earth at a steep angle. The light does not spread out as much, thus increasing the amount of energy hitting any given spot. Also, the long daylight hours allow the Earth plenty of time to reach warm temperatures.
During the winter, the sun’s rays hit the Earth at a shallow angle. These rays are more spread out, which minimizes the amount of energy that hits any given spot. Also, the long nights and short days prevent the Earth from warming up. Thus, we have winter!
