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 geography endogenetic movements endogenic process and creation of mountains major domains of the earth land and oceans study of continents - north america earth's movement and creation of landforms earthquake earthquakes

Which of the following describes a small water bodies surrounded by land on all the sides?

  1. Gulf

  2. Bay

  3. Lake

  4. Lagoon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A lake is an area filled with water which is surrounded by land from all sides. They are not part of the oceans, therefore are different from lagoons. There are both natural lakes as well as artificial lakes. 
Natural lakes are found majorly in mountainous areas, rift zones and artificial lakes are created by man for agricultural purposes or for industrial use etc.
Multiple choice physics winds, storms and cyclones wind and rain example of some natural phenomena uneven heating of earth

Ocean thermal energy is due to 

  1. temperature difference at different levels in the ocean

  2. tides in the ocean

  3. energy stored by the water waves

  4. pressure different at different levels in the ocean
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Different temperature at different levels of ocean.

The sun’s heat warms the surface water a lot more than the deep ocean water, which creates the ocean’s naturally available temperature gradient, or thermal energy.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Lagoon refers to

  1. A full moon

  2. A shallow body of water separated from a larger body of water by barrier islands or reefs.

  3. A spot in a desert made fertile by presence of water

  4. Horse shoe shaped coral reef
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A lagoon is a shallow body of water separated from a larger body of water by barrier islands or reefs. Lagoons are commonly divided into coastal lagoons and atoll lagoons. They have also been identified as occurring on mixed-sand and gravel coastlines. There is an overlap between bodies of water classified as coastal lagoons and bodies of water classified as estuaries. Lagoons are common coastal features around the world.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Out of total water content, sea constitutes

  1. 97.5%

  2. 71%

  3. 81%

  4. 91.2%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Earth is made up of 70% water and the remaining is land. This water is present in the oceans, frozen icecaps and glaciers, groundwater water and lakes, rivers and ponds. Oceans and seas hold 97.5% of all the available water on earth. Thus the correct answer is option is A.

Multiple choice evs - i water in our life where do we get water from? why conserve water uses of water

Estuaries are

  1. Freshwater wetlands

  2. Salt water wetlands

  3. Least productive ecosystem

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

Salt water or Marine wetlands are the coastal wetlands, many of which are being destroyed for obtaining space for agricultural lands and coastal developments. Important saltwater or marine wetlands are estuaries and mangrove swamps. Estuaries are one of the most highly productive ecosystems, which provide food and habitat to several marine and other organisms.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

The salinity of sea water is

  1. $2.5$%
  2. $3.5$%
  3. $4.5$%
  4. $5.5$%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sea water has a salinity of 3.5% i.e. the sea water contain about 35 grams of dissolved salt per kg of water ( about 1 litre of water ). This salinity is because of the rivers that carry chemical/salts dissolved out of rocks and soil. NaCl makes the most of this dissolved salt. 

So, the answer is option B

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Pick the correct statement.
I. The estuaries are semi-enclosed coastal body of water, which has a free connection with the open sea.
II. Estuaries may be considered as ecotones between the fresh and marine habitats.
Ill. The Estuaries are salt water lakes.
IV. The estuaries are fresh water lakes.

  1. I and II are correct.

  2. II and III are correct.

  3. III and IV are correct.

  4. I, II and III are correct.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Estuaries are unique plant and animal communities that have adapted to brackish water mixture of fresh water draining from the land and salty seawater. However, there are also several types of entirely freshwater ecosystems that have many similar characteristics to the traditional brackish estuaries. Estuaries may be considered as ecotones between the fresh and marine habitats.

Multiple choice zoology classification of living beings hierarchy of classification different types of classifications introduction to classification of living organisms

Organisms that can tolerate a wide range of salt concentration are termed as 

  1. stenosalline

  2. stenothalne

  3. euryhaine

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

Euryhaline organisms are able to tolerate a wide range of salt concentration (or salinaties). E.g. Poecillia sphenops is a fishasdu that can live fresh water, brackish water or salt water. 

Multiple choice evs sources of water water resources and conservation receding water table water conservation and irrigation importance of water water: a precious resource

The upper part of sea water mainly contains ______________.

  1. Nektons only

  2. Planktons only

  3. Nektons and planktons both

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

Plankton's are passively drifting or floating organisms. Most of these minute organisms, plankton includes photosynthesizing organisms as well as heterotrophic organisms.

So, the correct answer is 'Planktons only'

Multiple choice zoology pollution - a rising environmental problem sources of water pollution marine life water pollution

In an oil trap formed by an anticline, _____________ accumulates on top, ____________ in the middle, and ____________ at the bottom

  1. natural gas, oil, groundwater

  2. ground water, oil, natural gas

  3. oil, groundwater, natural gas

  4. oil, natural gas, ground water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In an anticline oil trap, fluids separate based on density. Natural gas is the least dense and accumulates at the top, followed by oil, and then groundwater at the bottom.

Multiple choice landforms on earth and external processes general physical geography general knowledge

A very large area of sea surrounded on three sides by land is called _______.

  1. Gulf

  2. Lagoon

  3. Estuary

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

A Gulf is a very large area of water surrounded by land on 3 sides. Bay is generally smaller than a gulf. A Lagoon is a part of a shallow body of water which is seperated naturally by a large body of water.

Multiple choice origin of universe universe and organic evolution biology

Which of the following is limiting factor in the productivity of the ocean:-

  1. NItrogen

  2. Phosphorous

  3. Magnesium

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The amount of primary production depends on a variety of environmental factors. These factors include the availability of essential inorganic nutrients, particularly nitrogen and phosphorus; water temperature; and the turbidity of the water. Open oceans have relatively low primary productivity because of low levels of the essential nutrients nitrogen and phosphorus. So, the correct option is 'Both A and B'.