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

Most of the freshwater on Earth is locked away in ______.

  1. groundwater

  2. ice

  3. oceans

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

While Earth has a lot of water, the vast majority of its freshwater is trapped in glaciers and ice caps. Only a small fraction is available as liquid water in rivers, lakes, or groundwater.

Multiple choice evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

Choose the correct option. The total water

  1. In the lakes and rivers of the world remains constant.

  2. Under the ground remains constant.

  3. In the seas and oceans of the world remains constant.

  4. Of the world remains constant.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The total water of the world remains constant because the water travels through a cycle and the net amount never changes. For example, The water which evaporates from various water bodies like lakes, rivers, ponds, etc form clouds and then they rain down filling up the same water bodies. They also go underground but in the end, they end up in a water body thus completing the water cycle.
  • Hence  The total water of the world remains constant.
  • So, the correct answer is 'Of the world remains constant'.
Multiple choice evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

The continuous movement of water on surface of the earth is described as

  1. Water movement

  2. Natural flow

  3. Water cycle

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

The water cycle involves the continuous movement of water on, above and below the surface of the Earth. The surface water evaporates by the process of evaporation which condenses into tiny droplets which falls on the earth as rain as a source of the atmospheric cycle. Surface waters and atmospheric cycles are thus overlaps in hydrological cycles. Thus, the correct answer is option C.

Multiple choice evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

Water cycle is made up of which of the two overlapping cycles?

  1. Surface waters and atmospheric cycles

  2. Oceanic and fresh water cycles

  3. Ground water and atmospheric cycles

  4. Global and smaller cycles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • The global water cycle describes the water movement globally. It is a complex pathway that includes the passage of water from the gaseous envelope around the planet called the atmosphere, through the bodies of water on the surface of the earth such as the oceans, glaciers, and lakes, and at the same time passing through the soil and rock layers underground. 
  • Later, the water is returned to the atmosphere. A fundamental characteristic of the hydrologic cycle is that it has no beginning and it has no end. It can be studied by starting at any of the following processes: evaporation, condensation, precipitation, interception, infiltration, percolation, transpiration, runoff, and storage. 

Therefore, the correct answer is option D.

Multiple choice zoology energy flow in an ecosystem the energy pyramid ecological pyramid ecological pyramids

Which one has always an upright/ steeper vertical gradient?

  1. Pyramid of mass

  2. Pyramid of energy

  3. Pyramid of numbers

  4. Pyramid of energy in aquatic ecosystem
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pyramid of energy represents the amount of energy at each trophic level. In any ecosystem, flow of energy declines as it passes from lower to higher trophic level. This is explained by second law of thermodynamics. Hence, the pyramid of energy always has an upright or steeper vertical gradient. In this, the energy decreases from one trophic level to the next trophic level because energy is lost as metabolic heat during transfer of energy. When food energy passes from producers to herbivores to carnivores, only 10% of energy is transferred from one trophic level to another trophic level.

Thus, the correct answer is 'Pyramid of energy.'