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

Night Glow of the sea is caused by

  1. diatoms

  2. slimemoulds

  3. noctiluca

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

 Night Glow of the sea is caused by Noctiluca scintillans, commonly known as the Sea Sparkle.

Multiple choice

Directions: Select the most appropriate filler(s) for the blank(s) such that the sentence makes coherent sense.

Compared with the tide, the wind - created waves are ________ movements felt, at most, no more than a hundred fathoms below the surface.

  1. ebb

  2. burgeoning

  3. surface

  4. intensifying

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

The essence of this sentence is that wind created waves as compared to tides are surface movements, at the max they are some 600 feet deep. Hence, (3) is the answer.

Multiple choice

Which of the following statements is/are correct?

a. Minerals and fossil fuels are renewable resources. b. The oceanic area upto 22 nautical miles from the coast is called territorial water. c. The oceanic resources beyond 100 nautical miles of the Exclusive Economic Zone belong to open ocean and no individual country can utilise these.

  1. a only

  2. b only

  3. c only

  4. a and c

  5. a, b and c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct answer as this statement is correct.

Multiple choice

Common salt is obtained from sea water by the process of

  1. sublimation

  2. evaporation

  3. crystallisation

  4. filtration
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Common salt (sodium chloride) is obtained from sea water by allowing the water to evaporate in large shallow pans, leaving the salt behind. Sublimation, crystallisation, and filtration are not the primary methods used for this large-scale extraction.

Multiple choice

Coral reefs are formed by ___________.

  1. diatoms

  2. zooplanktons

  3. polyps

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

Coral reefs are massive underwater structures built by colonies of tiny animals called coral polyps that secrete calcium carbonate.

Multiple choice

Marine habitats can be broadly divided into _____________.

  1. delta, coastal and deep sea

  2. coastal, continental and coral reefs

  3. wetlands, coastals and coral reefs

  4. coastal, deep sea and coral reefs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Marine habitats are commonly categorized based on depth and proximity to land, with coastal, deep sea, and coral reefs being major divisions.

Multiple choice

Which of the following statements is/are false?

a. The oceans and the seas cover about 3/4 the surface of the earth. b. The sea water is salty and is unfit for drinking or agricultural activities. c. The process due to which water changes into its vapour from its exposed surface is called precipitation.

  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 statement is false. The process due to which water changes into its vapour from its exposed surface is called evaporation.