Geography ยท 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

What is the term used to describe the organisms that live on or in the bottom of a body of water?

  1. Plankton

  2. Nekton

  3. Benthos

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

Benthos refers to the community of organisms that inhabit the bottom of a body of water, including the sediment and the water immediately above it.

Multiple choice

Which of the following is an example of a benthic adaptation?

  1. Streamlined body

  2. Bioluminescence

  3. Camouflage

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

Camouflage is a common benthic adaptation that helps organisms blend in with their surroundings and avoid predators.

Multiple choice

Which of the following is a major factor that influences the distribution and abundance of benthic organisms?

  1. Water temperature

  2. Sunlight

  3. Depth

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

Depth is a major factor that influences the distribution and abundance of benthic organisms, as it affects factors such as light availability, pressure, and temperature.

Multiple choice

What is the term used to describe the cultivation of marine organisms for commercial purposes?

  1. Mariculture

  2. Aquaculture

  3. Pisciculture

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

Mariculture refers to the cultivation of marine organisms, including fish, shellfish, and algae, in controlled environments for commercial purposes.

Multiple choice

What is the maximum amount of oil that a ship can discharge into the sea under MARPOL?

  1. 15 parts per million

  2. 100 parts per million

  3. 1,000 parts per million

  4. 10,000 parts per million
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Under MARPOL, the maximum amount of oil that a ship can discharge into the sea is 15 parts per million.

Multiple choice

What is ocean acidification?

  1. The process by which the ocean becomes more acidic.

  2. The process by which the ocean becomes more alkaline.

  3. The process by which the ocean becomes more saline.

  4. The process by which the ocean becomes more polluted.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ocean acidification is the process by which the ocean becomes more acidic due to the increased absorption of carbon dioxide from the atmosphere.

Multiple choice

What is the primary source of marine debris?

  1. Land-based sources

  2. Ocean-based sources

  3. Atmospheric sources

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

Land-based sources, such as littering, stormwater runoff, and sewage discharge, are the primary contributors to marine debris.

Multiple choice

What is the name of the type of flood that occurs when the sea level rises and inundates coastal areas?

  1. Flash Flood

  2. River Flood

  3. Coastal Flood

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

A coastal flood occurs when the sea level rises and inundates coastal areas. This type of flood can be caused by storm surges, tsunamis, or high tides.

Multiple choice

Which coastal zone management strategy involves the use of natural buffers to protect coastal areas from pollution and erosion?

  1. Beach nourishment

  2. Seawalls

  3. Breakwaters

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

Green infrastructure, such as wetlands, mangroves, and coral reefs, can act as natural buffers to protect coastal areas from pollution and erosion.

Multiple choice

Which of the following is an example of a surface wave?

  1. Ocean waves

  2. Sound waves

  3. Light waves

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

Surface waves are waves that travel along the boundary between two media. Ocean waves are an example of surface waves, as they travel along the boundary between water and air.

Multiple choice

What is ocean acidification?

  1. A decrease in the pH of ocean water

  2. An increase in the pH of ocean water

  3. A change in the salinity of ocean water

  4. A change in the temperature of ocean water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ocean acidification is a decrease in the pH of ocean water, caused by the absorption of carbon dioxide from the atmosphere.

Multiple choice

Which type of glacier is formed when a glacier flows into the sea and ends in a cliff?

  1. Piedmont Glacier

  2. Valley Glacier

  3. Ice Cap

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

A tidewater glacier is formed when a glacier flows into the sea and ends in a cliff.

Multiple choice

What is the average salinity of seawater?

  1. 35 parts per thousand

  2. 30 parts per thousand

  3. 40 parts per thousand

  4. 45 parts per thousand
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The average salinity of seawater is approximately 35 parts per thousand, meaning that there are 35 grams of dissolved solids in every kilogram of seawater.

Multiple choice

What is the primary source of dissolved solids in seawater?

  1. Weathering of rocks

  2. Volcanic eruptions

  3. Hydrothermal vents

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

Dissolved solids in seawater come from a variety of sources, including weathering of rocks, volcanic eruptions, and hydrothermal vents.

Multiple choice

How does the chemical composition of seawater vary with depth?

  1. It remains constant

  2. It becomes more concentrated

  3. It becomes less concentrated

  4. It varies depending on the location
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The chemical composition of seawater remains relatively constant with depth, except for minor variations in certain regions.