Geography · Environmental Studies

Oceanography and Hydrology

1,673 Questions

Find relevant questions on oceanography and hydrology that address aquatic ecosystems and physical geography. The topics include coastal landforms, coral reefs, ocean salinity, and tidal patterns. These concepts frequently appear in civil services and state level administrative examinations.

Coral reef structuresCoastal landformsOcean salinity patternsGlacial retreat impactsMangrove ecosystems

Oceanography and Hydrology Questions

Multiple choice

What do you mean by 'insular'?

  1. An area surrounded by land on all sides

  2. An area surrounded by water on all sides

  3. An area slightly elevated from the adjoining region

  4. An area drained by rivers from all sides
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Insular is an area (like islands) surrounded by water on all sides.

Multiple choice

Directions: Identify the type of the noun.

The Arabian Sea

  1. Proper Noun

  2. Common Noun

  3. Abstract Noun

  4. Material Noun

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Noun: is a word, which is used as the name of person, place, thing, action or quality. PROPER NOUN: The name given to a particular person, place or thing. Example: Rohit, Delhi, Monday.

Multiple choice

Which of the following grow in very salty environments such as the Great Salt Lake and the Dead Sea, where the environments are extremely alkaline?

a. Methanogens b. Halophiles c. Thermoacidophiles

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. Halophiles grow in very salty environments such as the Great Salt Lake and the Dead Sea, where the environments are extremely alkaline.

Multiple choice

Which of the following statements is/are correct?

  1. Ocean acidification is the name given to the ongoing increase in the pH of the oceans, caused by the uptake of anthropogenic carbon dioxide (CO2) from the atmosphere.
  2. The carbon cycle describes the fluxes of carbon dioxide (CO2) between the oceans, terrestrial biosphere, lithosphere and the atmosphere.

  1. Only 1

  2. Only 2

  3. Both of these

  4. Neither of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ocean acidification is the name given to the ongoing decrease in the pH of the oceans, caused by the uptake of anthropogenic carbon dioxide (CO2) from the atmosphere.

Multiple choice

Capture fishery and culture fishery are the two types of fishery. All of the following are the characteristics of capture fishery, except that

a. it is a method of obtaining fish from the natural resources b. there is no seeding and raising of fish c. it is undertaken mostly inland and near the seashore

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this is not a characteristic of capture fishery. It is undertaken in both inland and marine waters.

Multiple choice

Match the following:

 
a. Estuaries 1. They are the shallow saltwater lakes separated from sea banks, coral reefs, etc.
b. Lagoons 2. They are the last part of a river that gets tidal water from the sea.
c. Mangrove swamps 3. They are the tropical trees growing in the mud of seashore.

  1. a - 3, b - 2, c - 1

  2. a - 2, b - 3, c - 1

  3. a - 2, b - 1, c - 3

  4. a - 1, b - 2, c - 3

  5. a - 3, b - 1, c - 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. Estuaries are the last part of a river that gets tidal water from the sea. Lagoons are the shallow saltwater lakes separated from sea banks, coral reefs, etc. Mangrove swamps are the tropical trees growing in the mud of seashore.

Multiple choice

Which of the following is/are relatively large and spontaneous ocean surface waves that occur far out at sea?

  1. Wave–current interaction

  2. Tsunami

  3. Ocean current

  4. Rogue waves

  5. Hundred-year wave
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rogue waves (also known as freak waves, monster waves, killer waves, extreme waves, and abnormal waves) are relatively large and spontaneous ocean surface waves that occur far out at sea, and are a threat even to large ships and ocean liners.

Multiple choice

Which of the following is the odd one out?

  1. Rivers

  2. Lakes

  3. Ponds

  4. Wells

  5. Oceans
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Water in oceans are not a drinkable water as it contains lots of salt. Presence of lots of salt makes it unsuitable for drinking.

Multiple choice

What are ocean garbage patches commonly referred to as?

  1. Gyres

  2. Eddies

  3. Ripples

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

In the midst of ocean, garbage patches develop due to collection of marine waste brought together by ocean currents. These are dubbed as gyres. The Great Eastern Garbage Patch in the Pacific Ocean is the size of Rajasthan and Maharashtra combined.

Multiple choice

Which of the following statements about salinity is correct?

  1. Arabian sea shows higher salinity as compared to Bay of Bengal

  2. Bay of Bengal shows higher salinity as compared to Arabian sea

  3. Salinity increases with depth and there is a distinct zone called the halocline, where salinity decreases abruptly

  4. Salinity is very high in Black Sea due to high evaporation

  5. Average salinity of the Indian Ocean is 55 parts per thosand
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Arabian sea shows higher salinity due to high evaporation and low influx of rivers.

Multiple choice

Salt is obtained from sea water by the process of

  1. condensation

  2. sedimentation

  3. decantation

  4. evaporation

  5. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Salt is separated from sea water by the process of evaporation. The sea water is a liquid. Hence, it changes into vapours and vaporizes whereas salt being a solid does not. Thus, we get salt from sea water by the process of evaporation.