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

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.

Multiple choice geography irrigation and power generation of electricity exploration and conservation of minerals secondary sector : industry

OTEC refers to ________.

  1. Oceanic mineral resources conservation

  2. Tidal and wave energy conversion

  3. Ocean thermal energy conversion

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

Ocean Thermal Energy Conversion (OTEC) is a process that can produce electricity by using the temperature difference between deep cold ocean water and warm tropical surface waters. OTEC plants pump large quantities of deep cold seawater and surface seawater to run a power cycle and produce electricity.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

The dead aquatic organisms that were buried under the sand and clay of the sea bed, were converted to petroleum owing to:

  1. absence of air

  2. high temperature

  3. high pressure

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

The dead aquatic organisms that were buried under the sand and clay of the seabed, were converted to petroleum owing to the absence of air, high temperature, and high pressure.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

All of the water found on earth is called as

  1. Biosphere

  2. Stratosphere

  3. Hydrosphere

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

The water present on earth in form of lakes, oceans, rivers, etc is called hydrosphere. About 2/3rd (71%) of earth's crust is covered by water. This layer contains water which regulates the atmospheric temperature and ecosystem and also maintains the aquatic life on earth. About 2.5% of hydrosphere constitutes of fresh water. So, the correct option is C.

Multiple choice economics how does production take place? land land,labour, capital and entrepreneur production mechanism

The term "land" refers to _________.

  1. the surface of the earth

  2. the surface of the water

  3. the layer of the air

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

Marshall said, "By land is meant not merely land in the strict sense of the world, but whole of the materials and forces which nature gives freely for man's aid in land and water, in air, light and heat"

Multiple choice examples of bryophytes plant kingdom biology

Which of the following is least likely to occur along the sea coast?

  1. Green algae

  2. Brown algae

  3. Red algae

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

Mosses occupy a wide range of habitats. Mosses are typically found in moist environments although most species can withstand prolonged periods of desiccation. In terrestrial ecosystems, Mosses are important in preventing soil erosion. Numerous species of Moss are found in fresh water but there are no salt water species.