Geography · Environmental Studies

Oceanography and Hydrology

1,743 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 biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Choose the correct answers from the alternatives given.
Among different kinds of water which of the following is free from bacteria?

  1. Deep well water

  2. Sea water

  3. Water of hot springs

  4. Rain water as it falls down
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

These bacteria in rainfall don't seem to cause any harm to humans though. 

So, the correct option is 'Rainwater as it falls down'.

Multiple choice geography external forces - responsible for changes the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

What is flow of water?

  1. Direction according to mountain

  2. Direction according to gravity and slopes

  3. Direction according to wind

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

Running water flows naturally in a direction according to gravity along the slope and makes its own way. This is called a flow of water. When many such flows of water come together, a river is formed.

Multiple choice evs let's play with water law of constant proportion - i law of constant proportion law of definite proportions

The process of obtaining salt from sea water involves:

  1. evaporation

  2. condensation

  3. sublimation

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The process of obtaining salt from sea water involves the process evaporation is used an a large scale to obtain common salt from sea water. Sea water is trapped in shallow lakes and allowed to stand there. The heat of sun gradually evaporates water in the shallow lakes and common salt is left behind as a solid. Sea water has many salts dissolved in it.
Multiple choice geography india : physiographic units islands islands of india to our own islands

Consider the following statements:
1. The continental shelves of Lakshadweep are originated due to coral reefs.
2. The continental shelves of western coast are due to faulting and submergence.
Which of the statement(s) given above is/are correct?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The continental shelves of Lakshadweep are originated due to coral reefs. 2. The continental shelves of western coast are due to faulting and submergence.

The above statements are correct.

Multiple choice geography india : physiographic units islands islands of india to our own islands

Which of the following is the correct explanation of the word, 'Corals'?

  1. They are group of Islands.

  2. It is a Peninsula.

  3. Short living micro-organism.

  4. They are rocks.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Corals are marine invertebrates in the class Anthozoa of phylum Cnidaria.
  • They typically live in compact colonies of many identical individual polyps.
  • Coral, a sessile animal, relies on its relationship with plant-like algae to build the largest structures of biological origin on Earth.
Multiple choice geography india : physiographic units islands islands of india to our own islands

A group of islands is collectively called ________.

  1. Isthmus

  2. Archipelago

  3. Lagoon

  4. One of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A group of islands is collectively called Archipelago. An island is a piece of land that is surrounded on all sides by water. Most archipelagoes are made of oceanic islands. So the islands were formed by volcanoes erupting from the ocean. The islands are considered part of a larger land mass. Places such as Hawaii and the Virgin Islands are considered to be archipelagos.

Multiple choice geography india : physiographic units islands islands of india to our own islands

Lakshadweep Islands are the product of ______________.

  1. volcanic activity

  2. wave action

  3. sea-floor expansion

  4. reef formation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lakshadweep Islands are the product of Reef formation. Lakshadweep is an archipelago of twelve atolls, three reefs and five submerged banks, with a total of about thirty-nine islands and islets.

Multiple choice commercial applications bioenergy biofuels making biofuels technological and industrial development

Sea tides can be used as

  1. Sufficient amount of sunlight stored

  2. A device to take sun bath

  3. An energy source

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

Sea tides can be used as a source for generating electricity & in hydroelectric plants, the other options are incorrect and is not related to uses of sea tides.

So, the correct answer is 'An energy source'

Multiple choice biology animal behaviour ethology natural selection coordination in human beings- chemical control endocrine system in humans

Sinking of zooplankton during the day and rising to the
surface at night is an example of

  1. Circinal rhythm

  2. Circadian rhythm

  3. Tidal rhythm

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Circadian rhythm or diurnal rhythm is any 24 hour  periodicity in the behaviour or physiology of animals or  plants .Examples are sleep /activity cycle in many  animals and the growth movements of plants. Circadian  rhythms are generally controlled by biological clocks.

Multiple choice physics upthrust in fluids, archimedes' principle and floatation applications of floatation principle of floatation and its applications when do objects float on water?

Give reasons as to why It is easier to swim in sea water than in river water. 

  1. The density of river water is greater

  2. The density of sea water is greater

  3. Both their densities are the same

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sea water contains dissolved salts which makes its density more than river water Hence upthrust is more in sea water than river water So it is easier to swim in sea water than in river water 

Multiple choice physics upthrust in fluids, archimedes' principle and floatation applications of floatation principle of floatation and its applications when do objects float on water?

Give reasons as to why bodies like stones and metals sink in water.

  1. They have higher density compared to water

  2. They have lesser density compared to water

  3. They have the same density as that of water

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

Bodies like stones ans metals sink in water as these substances have density more than that of water

Multiple choice botany the living world archaebacteria the three domains of life classification of microbes

Archaebacteria live in harsh habitat like

  1. Extreme salty area

  2. Hot springs

  3. Marshy areas

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

Archaebacteria are prokaryotes without true nucleus. They are of mainly 3 types, halophiles, thermophiles and methanogesn. They live in harsh habitat. Halophiles archaebacteria are found in extreme salty areas. Thermophiles are found in hot springs where temperature is extremely high. Methanogens are found in marshy areas and produce methange gas.

Thus, the correct answer is 'All of the above.'

Multiple choice botany the living world archaebacteria the three domains of life classification of microbes

Halophilic archaebacterium (Halobacterium salinarum) found in the Great Salt Lake and the Dead Sea cannot live in

  1. Less than $3$M NaCl concentration
  2. Less than $5$M NaCl concentration
  3. More than $4$M NaCl concentration
  4. More than $3$M NaCl concentration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Halophiles are organisms that thrive in high salt concentrations. They are also called salt-loving microorganisms. They are found in hypersaline environments like in arid, coastal, deep‐sea, underground salt mines. They can comfortably live in evaporation ponds or salt lakes such as Great Salt Lake, Owens Lake and the Dead Sea. They cannot live in less than 3M NaCl concentration. The concentration higher than 3M NaCl in the environment will cause movement of water outside from a plant cell to the environment and cell will die due to osmotic stress. A concentration of less than 3M NaCl concentration in the environment will cause the movement of water inside the cell from the environment will cause the cell to burst and the plant will die.

Thus, the correct answer is 'Less than 3M NaCl concentration.'