There's been a lot of bad news for polar bears recently. In 2007, for example, scientists reported that if global warming continues unabated, the population could drop two-thirds by 2050.
The atmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form.
The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze.
This causes the low surface pressure to shift to over the ocean during the night and the high surface pressure to move over the land.
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Air above land warms quicker than air over water.</em></u></h2>
<span>Molten material found in the bottom of seafloors indicated underwater eruptions that formed new areas of the seafloor was presented as evidence for seafloor spreading. Due to earths magnetic polarity and its tendency to switch, iron present on the sea floor contained a magnetic record of sea floor expansion progress. Finally, drilling samples obtained in the seafloor indicated the deeper samples of were significantly older than the shallower samples that were brought up.</span>
