What has contributed to the loss of polar bears in arctic areas? Fires in the ta
ID: 289091 • Letter: W
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What has contributed to the loss of polar bears in arctic areas? Fires in the taiga and tundra O The tundra shifting northward O Hunting of the polar bear by the Inuit people O The decline of lemmings; the primary food of the polar bear O Decline in sea ice QUESTION 19 When volcanoes erupt, they emit into the atmosphere, resulting in a cooling effect on the planet. O particulates O water vapor nitrous oxide 0 methane QUESTION 20 Which of the following corectly describes the equinoxes? O The length of daylight at the Arctic and Antarctic Circle is 24 hours O They occur in June and December The Sun's vertical rays are striking either the Tropic of Cancer or the Tropic of Capricorm. 0 Days and nights are equal in length in all parts of the world. QUESTION 21 Which of the following is a synthetic greenhouse gas? Chlorofluorcarbons Water vapor Oxygen Methane NitrogenExplanation / Answer
18).
Decline in Sea ice
Polar bears are the marine mammals these are living in the arctic region full of sea ice and they have fat coating and the water propellent coatings which protects them from the cold, so to survive the need huge amount of fats which they got from seals which are found in the sea ice, so due to the glowal warming the temperature is increasing in these areas which results in the shortage of availability of the seals for the bears thus results in the malnutrition and the starvation to the polar bears that's why their nos are on decrement.
19).
Particulates-
The dust particles partially block the incoming rays of the sun, leading to cooling. particulates combines with water to form tiny droplets. These droplets are so small that many of them can stay aloft for several years. They are efficient reflectors of sunlight, and screen the ground from the sun.
20).
Days and nights are equal in duration in all parts of the world
On the day of an equinox, daytime and nighttime are of approximately equal duration all over the planet. This occurs in the 20 march 23 september when the equators plane of disc is parallel with the sun's disc means sun rays is directly incident over the equator. The word is derived from the Latin aequinoctium, from aequus (equal) and nox (genitivenoctis) (night).
21).
Chloroflorocarbons
These are artificially generated from the release of the coolent gases present in the airconditioners and the refrigerators and the left gases are occuring in the natural form.
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