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 chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

Delta formation at the mouth of river takes place by:

  1. coagulation of negative salt ions and positive river particles

  2. coagulation of positive salt ions and negative river particles

  3. coagulation of positive salt ions and positive river particles

  4. coagulation of negative salt ions and negative river particles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

River water contains charged colloidal particles of clay, sand and many other materials. Sea water is very big store house of a variety of electrolytes dissolved in it. As soon as river water comes in contact with sea water coagulate the suspended colloidal particles which ultimately settle down at the point of contact. Thus the level of the river bed rises. As a result, water adopts a different course and delta is formed in due course of time.

Multiple choice fluid dynamics option b: engineering physics physics

After the storm, the sea water waves subside due to:

  1. Surface tension of sea-water

  2. Disapperance of heavy currents

  3. The viscosity of sea water

  4. Gravitational pull of the storm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

After the storm, the sea water waves subside due to the viscosity of sea water. Since viscosity's main cause is cohesive force which acts in intermolecular particles. So, sea water waves subside due to these cohesive force between water molecules.

Multiple choice evs sun and planets phases of moon moon and it's phases moon

Miriam notices when she goes to the beach that sometimes the water rises as high as the pier. At other times of the day, the water barely covers the pillars under the pier. These differences in water level are primarily due to the gravitational influence of which of the following?

  1. The Sun

  2. The Moon

  3. Asteroids

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

The different levels of the water of a sea are known as tides. Higher level is known as high tide and lower as low.

Tides are due to the gravitational forces of the Moon and the Sun. The tide is high when the moon or the sun or both are on the side of the sea and vice versa.
The effect of tides due to the moon is much greater than that of the sun, because the moon is much closer to the earth.
The differences in water level are primarily due to the gravitational influence of the moon and secondarily due to that of the sun.

Multiple choice biology waste generation and management disposal of waste safe disposal of waste solid waste and its management

The total solid matter washed into the sea is approximately

  1. 300 million tonnes

  2. 1300 million tonnes

  3. 2300 million tonnes

  4. 3300 million tonnes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scientific estimates of the total solid matter transported by rivers into the oceans are generally cited around 300 million tonnes annually. This is a specific factual figure often found in environmental science textbooks.

Multiple choice chemistry changes around us crystallisation process of separating components of a mixture physical changes

The process of obtaining salt by evaporation of seawater is known as :

  1. crystallisation

  2. sedimentation

  3. galvanization

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

It is known as crystallization - because salt is obtained in crystal form.

Sedimentation is depositing solid as sediment
Galvanization - is the process of protecting iron/metal by a coating of zinc.
Amalgamation - is the formation of amalgam (an alloy of mercury with another metal).

Multiple choice chemistry changes around us crystallisation process of separating components of a mixture physical changes

Salt can be obtained by ___________ of sea water.

  1. sublimation

  2. cooling

  3. evaporation

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

On evaporation of seawater in shallow pools, salt along with impurities remain behind. Impured salt is taken in a tank and its saturated solution is prepared. In a saturated solution of salt, HCl vapours are passed. Chloride ions being common to both, it's concentration increases, and NaCl gets precipitated which is free from impurities.

Multiple choice civics helper to all different types of houses dignity of work houses and its type public property public property and its protection

Size of a water body like lake varies according to the seasons.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A flood is an overflow of water that submerges land that is usually dry. Flooding may occur as an overflow of water from water bodies, such as a river, lake, or ocean, in which the water overtops or breaks levees, resulting in some of that water escaping its usual boundaries, or it may occur due to an accumulation of rainwater on saturated ground in an areal flood. While the size of a lake or other body of water will vary with seasonal changes in precipitation and snow melt, these changes in size are unlikely to be considered significant unless they flood property or drown domestic animals.

Multiple choice evs water: a precious resource importance of water let's play with water water and its properties water resources and conservation

Saline water from the oceans consists of ______ percentage of the total water present on the Earth.

  1. $92.5$
  2. $93.7$
  3. $99.8$
  4. $79.5$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Approximately 97 percent of Earth's water is saline, found in the oceans. Among the options provided, 93.7 percent is the closest accepted value in many textbooks.

Multiple choice biology water a precious resource water cycle earth's energy budget bio-geo chemical cycles in nature solar energy and its applications

The continuous process by which water moves from form to another is called as

  1. Condensation

  2. Water cycle

  3. Nutrient cycle

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

The water cycle (or hydrological cycle) describes the continuous movement of water on, above, and below the surface of the Earth through various states and locations.

Multiple choice asia : climate, natural vegetation and wildlife climate and natural vegetation of asia asia asia and europe geography

Warm Kuroshio and Cold Oyashio currents affects ?

  1. Japan and other islands in Asian continent

  2. Antarctica

  3. European countries

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

The Kuroshio Current is a major western boundary current controlled by the North Pacific Gyre. It brings warm subtropical waters from the Indo-Pacific Warm Pool to Japan exerting a major control on Asian climate. The Tsushima Current is a Kuroshio offshoot transporting warm water into the Japan Sea.