10. What is the real cause behind \"global warming\" A. Increasing CO, B. C. Vol
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10. What is the real cause behind "global warming" A. Increasing CO, B. C. Volcanoes D. Deforestation Increasing human population I1. What is permafrost? A. B. C. D. curly crystals of frost that form early in the morning ice and snow that exist throughout the entire year ice and snow that are permanently in motion the upper part of the ground that remains frozen throughout the year 12. What type of moraine is formed by the merging of two lateral moraines at junction of two valley glaciers? A. end B. medial C. recessional D. ground 13. Ifall of Antarctica's ice were to melt, sea level would A. not change B. rise about 4 meters C. rise about 65 meters D. rise about 800 meters 14. If a very large iceberg in the ocean were to melt, what would happen to sea level? A. Sea level would decrease slightly B. Sea level would remain the same. C. Sea level would increase slightly D. Sea level would decrease or increase depending on the air content of the iceberg 15. The current that moves sand and water parallel to the beach is known as A. meandering current B. tidal surge C. longshore current D. beach currentExplanation / Answer
10. The real cause of global warming is continuous increase in carbon dioxide concentration day by day, in 2016 the sharp jump in co2 is seen i.e 3 ppm. hence option A is correct
11. permafrost: these are the sediments or rock that remain frozen for more than two consecutive years and the temperature should be less than 0 degree celcius through out the year.
hence option D is correct
12. B medial moraine: these are the debris formed when two lateral moraines join at the intersection of two streams of ices; the final outcome would lie in the middle of the combined glacier.
13. if all antarctic ice were to melt sea level would not remain fixed it would rise around 65 to 70 meters. Hence option C is correct.
14. according to the Archimedes principle : a floating body will displace an amount of fluid that is equal to its weight. so the icebegs floats and it has the same weight as of waterit displaced,but if in the ice the same salt concentration would present as that of ocean water then there whould not be anychange in water level but in real the ice is not salty and have density lower than ocean water so it will occupy more volume when it melts so there would be slight increase in water level. hence C is correct
15.longshore current: it is the longshore current that moves sand and water parallel to beach it also puches water down the length of the beach in one direction and also they come at a slight angle, known as “angle of wave approach. hence option C is corrent.
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