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 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.'

Multiple choice

Which of the following is NOT a way the water cycle helps transport matter all over Earth?

  1. ocean currents move sand around the world

  2. rivers transfer land water into the ocean

  3. wind carries leaves across a lake

  4. glaciers carry ground rock with them as they flow
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The water cycle involves the movement of water through evaporation, condensation, and precipitation. While wind can move leaves, it is not a mechanism of the water cycle transporting matter.

Multiple choice

Deep ocean currents help transport water all over Earth. How are they formed?

  1. denser, warm water sinks creating the currents

  2. denser, cold, and/or salty water sinks creating the currents

  3. the wind forces surface currents underwater

  4. marine life create the steady flow of the currents
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Deep ocean currents are driven by thermohaline circulation, which is caused by differences in water density. Denser water, which is colder or saltier, sinks and drives the global conveyor belt.

Multiple choice commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

Upper part of sea/aquatic ecosystem contains

  1. Plankton

  2. Nekton

  3. Plankton and nekton

  4. Benthos
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A.Plankton - a group of uncellular organisms
B.Nekton - aquatic animals that are able to swim and move independently of water currents.
C.Plankton and nekton - a group of uncellular organisms and quatic animals that are able to swim and move independently of water currents.
D.Benthos - organisms present at the bottom of the water bodies.
So, the correct option is 'Plankton and nekton'.
Multiple choice geography natural vegetation and communities dependent on forest forests and their conservation biotic resources: natural vegetation and wildlife natural vegetation and animals in india

Tick the correct answer.
Mangrove forests can thrive in _______.

  1. saline water

  2. fresh water

  3. polluted water

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

Saline water,

There are about 80 different species of mangrove trees. All of these trees grow in areas with low-oxygen soil, where slow-moving waters allow fine sediments to accumulate. Mangrove forests only grow at tropical and subtropical latitudes near the equator because they cannot withstand freezing temperatures.

Multiple choice geography natural vegetation and communities dependent on forest forests and their conservation biotic resources: natural vegetation and wildlife natural vegetation and animals in india

Deltas, estuaries and beaches in coastal areas have peculiar type of vegetation that has aerial roots and can grow in salty water. This is called ________________.

  1. Mangrove vegetation

  2. Evergreen vegetation

  3. Shola forest

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

Deltas, estuaries and beaches in coastal areas have peculiar type of vegetation that has aerial roots and can grow in salty water. This is called Mangrove vegetation.

Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

Many marine animals use carbonates dissolved in sea-water to make their shells. Which of the following component is reduced in our atmosphere by this biological phenomenon?

  1. Oxygen

  2. Calcium carbonate

  3. Carbon dioxide

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

Shell of many marine organism are made of calcium carbonate. Carbonate is formed when carbon dioxide (CO2) from atmosphere get react with the sea water. It also help us to maintain carbon dioxide level in the atmosphere because today scenario is very alarming due to increasing level of carbon dioxide. 

So, the correct option is 'Carbon dioxide'.

Multiple choice biology the habitat of living climate factors abiotic components organisms and environment

Life arose in

  1. Soil

  2. Fresh water

  3. Marine water

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

We know that the environment we live in is made up of 2 components, namely living (biotic) and non-living (abiotic). Different theories were proposed to study the origin of the wife. But they lead to the conclusion that life had originated on earth in seawater and marine organisms were one of the first to emerge. In earth's early atmosphere, there was no ozone layer, thus the UV rays of the sun could directly reach the earth. As living organisms cannot survive UV radiation directly, many scientists believed that life originated in aquatic habitats. Apart from this, different requirements of these early organisms were also fulfilled in the deep-sea vents. 

Thus, option C 'Marine Water' is the correct option.