The answer is - Sunspots.
Sunspots are dark in appearance, but only on a visible light, and this is due to the fact that they are much cooler than the surrounding areas, but that doesn't mean by any means that the sunspots are cool, on contrary, they are very hot too. Sunspots actually are storms that appear in the lower atmosphere of the sun.
The different standard times are known as time zones. Time zones are useful because they can allow people to be active during the day and sleep during the night. If people spent hours with sunlight sleeping and worked in the dark, they would likely suffer health problems.
Big countries such as Australia and the United States have many time zones so that people can work and sleep in the time that is adjusted to the hours with sunlight in their specific location.
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China’s geographic location is inherently land bound, as in not near the coast or ocean which hindered sea trading in the past. This hindered their development through trading via sea ports.
8. B
9. D
10. C
11. A
12. (called the polor front but there are only 4 definitions??)
<span>B) Hurricanes derive their energy from heat.
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A hurricane begins with a pre-existing
disturbance, an area of low pressure. Favorable conditions advances to the
formation of hurricanes. The first one which greatly contributes to the
seasonal variation in the number of hurricanes that form in the Atlantic is an
increase in sea surface temperatures. For a tropical depression to mature into a
hurricane, it requires heat energy from the ocean surface.</span><span>
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