F4 16th Nov

Which of the following year is the satellite begines to record the sea ice?

• 1970

• 1950

• 1959

• 1979

When was the minimum sea ice recorded?

• At the beginning of each year

• At the end of each summer

• At the end of each year

• At the end of each autumn

The area of the perennial ice has been steadily _______.

• increasing

• decreasing

What is calving?

• The process, condition, or result of being covered by glaciers or ice sheets.

• The process of ice being worn by long exposure to the atmosphere

• The breaking of ice chunks from the edge of a glacier

Water runs beneath the glacier to ocean and forms plume. Which of the following statement is correct?

• Plume rises and become warmer

• Plume melts the glacier face from the top down

• Meltwater is weight more than sea water

How many metres has the global mean sea level risen since 1993?

• 0.07

• 0.09

• 0.08

• 1

How many metres will sea levels rise, If the western portion of Antarctica melts?

• 1

• 2

• 3

• 4

Which of the following are the reasons why West Antarctica considered the most important piece of ice in the world?

• It located western part of Antarctica which is below sea level

• The increasing temperature of sea water will make it melts rapidly.

• It located western part of Antarctica which is above sea level

If the sea level rises 3 metres, which of the following places will be submerged in the projection?

• Bangladesh

• Part of Netherlands

• Miami

• New York

What is the cause of seasonal variation of carbon dioxide in Keeling's study?

• Human use more coal in winter rather than summer

• Plants grow in spring and die back in autumn

• Ocean absorb more carbon dioxide in summer