Earth Science MCQs (Part 12 of 21)

  1. Which of the following characteristics best describes the Bay of Bengal?

    1. Open ocean upwelling and winter cooling.

    2. Strong stratification in salinity in surface waters.

    3. High primary production.

    4. Suboxic intermediate waters.

  2. If SCO2 in sea water is increased by the addition of bicarbonate and carbonate ions from rivers, the ocean will become

    1. more acidic (pH 6.5)

    2. neutral in pH (pH 7)

    3. less acidic (pH 8)

    4. more alkaline (pH 8.4)

  3. Coriolis force arises due to

    1. revolution of the earth around the sun

    2. rotation of the earth around its axis

    3. revolution of the earth-moon system around sun

    4. gravitational attraction of the earth-moon system

  4. Oxygen minimum zone within the ocean occurs because of very

    1. high biological production.

    2. good water circulation.

    3. high vertical mixing.

    4. high lateral advection.

  5. Wind blowing over the ocean surface drives an ocean current and if the wind stops abruptly the current continues to flow. This flow is known as

    1. geostropic motion.

    2. intertial motion.

    3. motion with friction.

    4. buoyancy driven motion.

  6. In an El Nino year, the western pacific warm pool moves towards the east and this modifies the

    1. Hadley circulation

    2. Langmuir circulation.

    3. Ferrel circulation

    4. Walker circulation

  7. If the radius of the earth is R, what is the shortest curved distance on the earth's surface between the location A (60° N, 10° E) and B (60° N, 10° W)?

    1. R/36

    2. R/18

    3. 3/36 R

    4. 3/18 R

  8. The monthly rain fall (mm) of a city in the southern hemisphere is given below:

    JAN

    FEB

    MAR

    APR

    MAY

    JUNE

    JULY

    AUG

    SEP

    OCT

    NOV

    DEC

    Rainfall in mm 100

    Rainfall in mm 87

    Rainfall in mm 01

    Rainfall in mm 0

    Rainfall in mm 0

    Rainfall in mm 0

    Rainfall in mm 0

    Rainfall in mm 0

    Rainfall in mm 0

    Rainfall in mm 0

    Rainfall in mm 2

    Rainfall in mm 75

    From this data, one can infer that

    1. summer is a dry season

    2. winter is a dry season

    3. distribution of rainfall is bimodal

    4. annual precipitation is 100 mm.

  9. Carbon dioxide is a greenhouse gas that can cause global warming and sea level rise. If we have enough financial resources and technology, we can completely remove CO2 from the atmosphere. However, this may not be desirable mainly because

    1. the earth may go into an ice-age

    2. it will have an adverse effect on bio-diversity.

    3. plants may become extinct followed by animals and humans

    4. The pH of the rain water will increase.

  10. The depth at which thermocline starts in the oceans

    1. increases from equatorial regions to polar regions.

    2. decreases from west to east.

    3. increases from west to east.

    4. decreases from equatorial to polar regions.