Tag: landforms of the earth and internal forces

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Questions Related to landforms of the earth and internal forces

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Consider the following statements:
I. Ocean currents are large mass of surface water, that circulate in regular patterns around the oceans.
II. The planetary winds are probably the dominant influence on the flow of ocean currents.
III. The water of high salinity are denser than the water of low salinity.
IV. A land mass always obstructs and diverts an ocean current.
Which of the statements given above is/are correct?

  1. All of these

  2. I, II and III

  3. I and III

  4. Only II
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All statements are correct: I defines currents, II identifies wind as the primary driver, III correctly notes that salinity increases density, and IV identifies that landmasses act as barriers to current flow.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

The acidification of oceans is increasing. Why is this phenomenon a cause of concern?

1. The growth and survival of calcareous phytoplankton will be adversely affected.
2. The growth and survival of coral reefs will be adversely affected.
3. The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4. The cloud seeding and formation of clouds will be adversely affected.
Which of the statements given above is/are correct? 

  1. 1, 2 and 3

  2. Only 2

  3. 1 and 3

  4. 1, 2, 3 and 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ocean acidification reduces carbonate ion availability, harming calcifying organisms like phytoplankton and corals (1, 2). Larval stages are sensitive to chemical changes (3). Furthermore, reduced phytoplankton productivity can impact dimethyl sulfide production, which is involved in cloud formation (4).

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Consider the following statements with reference to the continental shelf:
1. It is submerged in water. 
2. Its average depth is 100 fathoms.
3. Its higher percentage is found in the Pacific ocean.
4. It is wider, where high mountains are close and parallel to the coast.
Which of the statements given above is/are correct?

  1. All of the below

  2. 1, 2 and 3

  3. 1 and 2

  4. Only 1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The continental shelf is submerged (1) and its average depth is indeed about 100 fathoms (2). Statement 3 is incorrect as the Atlantic has a larger percentage of continental shelves. Statement 4 is incorrect because shelves are generally narrow where mountains are close to the coast.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Which of the following factors affects the origin and nature of movement of ocean current?

  1. Gravitational force

  2. Density differences

  3. Direction and shape of coastline

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ocean currents are influenced by a combination of factors including gravitational forces, density differences (thermohaline circulation), and the physical shape of coastlines which deflects flow.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

With respect to thermocline, choose the correct statement:
1. Layer in which temperature changes more rapidly than it does in layers above as below.
2. It depends upon season, latitude and turbulent mixing by wind.
3. It may be semi-permanent feature of body of water in which they occur.

  1. 1 only

  2. 1 and 2 only

  3. 3 only

  4. all of them
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The thermocline is a transition layer where temperature drops rapidly with depth. Its depth and intensity are influenced by seasonal changes, latitude, and wind-driven mixing, and it often acts as a semi-permanent feature in the water column.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Which among the following statements about the North Atlantic Drift is/are correct?
1. It keeps the West coast of Northern Europe ice free.
2. It is responsible for the warm air mass which interacts with the cold air mass from the Polar region and causes rainfall in Western Europe.
3. It meets the Labrador current near Vancouver Island and causes dense fog.

Select the correct answer using the - codes given below

  1. 1, 2 and 3

  2. 1 and 2

  3. Only 2

  4. 1 and 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The North Atlantic Drift keeps Northern Europe ice-free (1) and influences the climate by bringing warm air (2). Statement 3 is incorrect because the North Atlantic Drift does not meet the Labrador current near Vancouver Island; that meeting occurs in the North Atlantic off the coast of Newfoundland.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Tides are of various types, caused by different alignments of Sun, Moon and Earth. Choose correct statement.
1. Height of high tide and low tides at different places in different oceans, differs. 
2. At perigee, spring tide gets abnormally high.
3. Same place will have another spring tide after 12 hours exactly.

  1. Only 1

  2. 1 and 2

  3. 1 and 3

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tide heights vary by location due to basin shape (1). Perigee (when the moon is closest to Earth) increases the gravitational pull, leading to higher spring tides (2). Statement 3 is incorrect because the interval between high tides is roughly 12 hours and 26 minutes, not exactly 12 hours.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Which of the following statements relating to tsunami is/are correct?
As the tsunamis leave the deep water of the open sea and travel towards shallow water:
1. The speed is reduced considerably.
2. They attain enormous height.
3. They appear as a gentle rise and fall of the sea.

Select the correct answer using the codes given below.

  1. 1 and 2

  2. 2 and 3

  3. Only 1

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As tsunamis enter shallow water, their speed decreases due to friction, and their energy is compressed into a smaller volume, causing the wave height to increase significantly. Statement 3 is incorrect because tsunamis are not just gentle rises and falls; they are powerful, destructive surges.