CBSE Questions for Class 8 General Knowledge General Physical Geography Quiz 4 - MCQExams.com

Estuaries possess distinct blooms of excessive growth of a pigmented dinoflagellates. These blooms are called ________.
  • red tides
  • sea tides
  • black tides
  • sea flowers
Continental shelf is ___________.
  • A part of oceanic crust made of granite
  • A part of continental crust made of basalt
  • A part of oceanic crust made of basalt
  • A part of continental crust made of granite
Waves often change direction as they approach a shoreline, a phenomenon known as ____________.
  • wave refraction
  • wave reflection
  • wave diffraction
  • wave diffusion
Identify the wrong pair.
  • North-East Pacific: Dogger Bank
  • North-West Atlantic : Grand Banks
  • North-East Atlantic: Great Fisher Bank
  • North-West Atlantic : Chesapeake Bay
Surface currents in the ocean are primarily caused by ___________.
  • temperature differences
  • density differences
  • wind action
  • coriolis effect
Which one of the following factors is responsible for change in the regular direction of the ocean currents in the Indian Ocean?
  • Indian Ocean is half an ocean
  • Indian Ocean has Monsoon drift
  • Indian Ocean is a land-locked ocean
  • Indian Ocean has greater variation in salinity
Consider the following statements
The annual range of temperature is greater in the Pacific Ocean than that in the Atlantic Ocean.
The annual range of temperature is greater in the Northern hemisphere than that in the Southern hemisphere.
Which of the statements given above is/are correct?
  • Only 1
  • Only 2
  • Both 1 and 2
  • Neither 1 nor 2
Which one among the following best explains the reason for the Eastern and Western boundaries of the Pacific Ocean experiencing frequent earthquake?
  • There are deep ocean trenches along these margins
  • High mountain stretch along the continental margins adjacent to this ocean
  • These margins coincide with the plate margins
  • The currents of the vast Pacific Ocean continue to dash against the continental margins
Which of the following currents is located near the coastline of Philippines and China?
  • Oyashio current
  • Kuroshio current
  • Canary current
  • Benguela current
Which one among the following sequences of water bodies, from lower to higher salinity concentration, is correct?
  • Gulf of California-Baltic Seas-Red Sea-Arctic Sea
  • Baltic Sea-Arctic Sea-Gulf of California-Red Sea
  • Red Sea-Gulf of California-Arctic Sea-Baltic Sea
  • Arctic Sea-Gulf of California-Baltic Sea-Red Sea
Consider the following statements with reference to the continental shelf:
It is submerged in water. 
Its average depth is 100 fathoms.
Its higher percentage is found in the Pacific ocean.
It is wider, where high mountains are close and parallel to the coast.
Which of the statements given above is/are correct?
  • All of the below
  • 1, 2 and 3
  • 1 and 2
  • Only 1
The river bank is weakest where the river turns. This is because water __________.
  • gets concentrated in the inner bank of the turn, making it-denser
  • effectively bounces off the outer bank as it turns exerting an extra pressure on the bank
  • flows faster as it turns
  • reacts more effectively with the bank at a turn
The acidification of oceans is increasing. Why is this phenomenon a cause of concern?
The growth and survival of calcareous phytoplankton will be adversely affected.
The growth and survival of coral reefs will be adversely affected.
The survival of some animals that have phytoplanktonic larvae will be adversely affected.
The cloud seeding and formation of clouds will be adversely affected.
Which of the statements given above is/are correct? 
  • 1, 2 and 3
  • Only 2
  • 1 and 3
  • 1, 2, 3 and 4
With respect to thermocline, choose the correct statement:
Layer in which temperature changes more rapidly than it does in layers above as below.
It depends upon season, latitude and turbulent mixing by wind.
It may be semi-permanent feature of body of water in which they occur.
  • 1 only
  • 1 and 2 only
  • 3 only
  • all of them
Thermohaline is a part of large scale ocean circulation around the earth. Choose correct statements:
It is driven by density gradient.
It includes both the processes of sinking and upwelling of waters.
State of circulation has large impact on climate of Earth.
It is sometimes called ocean conveyor belt or meridional overturning circulation.
  • 1 and 4
  • 1 and 3
  • 1, 2 and 3
  • All of these
The coral reefs are the marine counterparts of __________.
  • temperate forests
  • tropical rain forests
  • savannas
  • scrubland
Which of the following factors affects the origin and nature of movement of ocean current?
  • Gravitational force
  • Density differences
  • Direction and shape of coastline
  • All of the above
Which of the following constitutes highest coverage of Earth's surface?
  • Pacific ocean
  • Atlantic ocean
  • Indian ocean
  • None of the above
Which of the following conditions hinders the development of corals?
  • Temperature of water between 20-21° C
  • Existence of submarine bench or a platform
  • Sediment free water
  • Fresh water
Which among the following statements about the North Atlantic Drift is/are correct?
It keeps the West coast of Northern Europe ice free.
It is responsible for the warm air mass which interacts with the cold air mass from the Polar region and causes rainfall in Western Europe.
It meets the Labrador current near Vancouver Island and causes dense fog.
Select the correct answer using the - codes given below
  • 1, 2 and 3
  • 1 and 2
  • Only 2
  • 1 and 3
Tides are of various types, caused by different alignments of Sun, Moon and Earth. Choose correct statement.
Height of high tide and low tides at different places in different oceans, differs. 
At perigee, spring tide gets abnormally high.
Same place will have another spring tide after 12 hours exactly.
  • Only 1
  • 1 and 2
  • 1 and 3
  • All of the above
Regarding Apogean tide, choose the correct statements.
When Sun and Earth is at minimum distance.
When Moon is farthest from Earth.
When Moon is nearest to Earth.
When Moon is at 90° to Sun.
  • 2 only
  • 2 and 4
  • 1 and 3
  • None of these
The interval between two high tides is approximately _________.
  • 4 h 12 m
  • 6 h 13 m
  • 12 h 26 m
  • 24 h 52 m
Identify the odd one.
  • Benguela current
  • Peruvian current
  • Canary current
  • Gulf stream
Which one of the following is the correct sequence of the four stages of water movement in a hydrological cycle?
  • Evaporation- Condensation- Precipitation- Infiltration
  • Evaporation- Precipitation- Condensation-Infiltration
  • Infiltration- Evaporation- Condensation-Precipitation
  • Condensation- Precipitation- Evaporation- Infiltration
Which of the following statements relating to tsunami is/are correct?
As the tsunamis leave the deep water of the open sea and travel towards shallow water:
The speed is reduced considerably.
They attain enormous height.
They appear as a gentle rise and fall of the sea.
Select the correct answer using the codes given below.
  • 1 and 2
  • 2 and 3
  • Only 1
  • All of these
Volcanic eruptions do not occur in the ____________.
  • Baltic Sea
  • Black Sea
  • Caribbean Sea
  • Caspian sea
Identify the correct decreasing order of salts in terms of % in sea water.
  • Sodium Chloride, Magnesium Sulphate, Calcium Sulphate, Magnesium Chloride
  • Calcium Sulphate, Sodium Chloride, Magnesium Sulphate, Magnesium Chloride
  • Sodium Chloride, Magnesium Chloride, Magnesium Sulphate, Calcium Sulphate
  • Sodium Chloride, Magnesium Chloride, Calcium Sulphate, Magnesium Sulphate
Which one of the following is responsible for the characteristic reddish colour of Red sea?
  • Red algae
  • Brown algae
  • Green algae
  • Blue-green algae
On the planet Earth, most of the fresh water exists as ice caps and glaciers. Out of the remaining fresh water, the largest proportion _____________.
  • is found in atmosphere as moisture and clouds
  • is found in freshwater lakes and rivers
  • exists as groundwater
  • exists as soil moisture
Extensive coral formations develop between 30°N and 30°S especially on the sides of the landmasses.
  • Eastern
  • Western
  • Northern
  • Southern
Which one of the following countries of South-West Asia does not open out to the Mediterranean Sea? 
  • Syria
  • Jordan
  • Lebanon
  • Israel
Which one of the following pairs is not correctly matched?
  • Kuroshio: Warm ocean current
  • Labrador: Warm ocean current
  • Benguela : Cold ocean current
  • Oyashio: Cold ocean current
What is Gulf Stream?
  • A cold current in the Atlantic Ocean
  • A cold current in the Pacific Ocean
  • A warm current in the Atlantic Ocean
  • A warm current in the Pacific Ocean
With respect to tidal boses a phenomena observed at mouth of river, choose the correct statement.
It is a wall of water that moves up certain low lying rivers due to incoming tides.
Rivers flowing  into sea, when obstructs the passage of crest of tidal waves, it forms tidal bores.
Narrow and low lying coastal rivers with gentle channel gradient is a favorable condition.
  • Only 1
  • 2 and 3
  • 1 and 3
  • All of these
Generally salinity  __________.
  • dereases from equator to poles
  • decreases from poles to equator
  • decreases from equator till subtropical latitudes and increases later
  • increases from equator till subtropical latitudes and decreases later
Which of the following theory is related to origin of tides.
Isostasy theory 
Dynamic theory of Laplace
Canal theory of G. B. Airy
Equilibrium theory of Newton.
  • 1 and 4
  • 1 and 3
  • 2 and 4
  • 2, 3 and 4
The increase in salinity of water ________.
  • increases the rate of evaporation
  • decreases the rate of evaporation
  • has no effect on the rate of evaporation
  • increases the rate of evaporation initially but decreases later
Which one of the following countries is not situated in the region between the Caspian Sea and the Black Sea?
  • Armenia
  • Azerbaijan
  • Georgia
  • Ukraine
The most important fishing grounds of the world are found in the regions where ___________.
  • warm and cold atmospheric currents meet
  • rivers drain out large amounts of freshwater into the sea
  • warm and cold oceanic currents meet
  • continental shelf is undulating
Tsunamis are not caused by __________.
  • hurricanes
  • earthquakes
  • undersea landslides
  • volcanic eruptions
Evaporation is greater when __________.
  • warm air flows over warm current
  • warm air flows over cold current
  • cold air flows over warm current
  • cold air flows over cold current
Identify the incorrect statement (s).
Other things being equal, the differential effect of wave refraction tends to smooth the coastal outline.
A wave of translation can be a powerful force of destruction.
Waves often change direction as they approach the shore, a phenomenon known as Wave Refraction.
Wave amplitude is one half of the wavelength. 
  • Only 1
  • 1 and 3
  • Only 2
  • None of these
Consider the following statements:
Nearly 30% of the petroleum production in the world is from the offshore areas.
The exclusive economic zone in the oceans extends upto 100 nautical miles from the coast. 
Only less than 1% of marine area is declared as protected area.
The largest marine protected area is the Great Barrier Reef.
Which of the statements given above are correct?
  • 1 and 2
  • 1, 3 and 4
  • 1 and 4
  • 2 and 3
Identify the incorrect statement(s) about marine deposits.
Blue mud covers the largest area of ocean.
Green mud is found in abundance on the sea floor near the Cape of Good Hope.
Grey colour of Green Mud is because of mineral Glauconite.
Red Clay is the most widespread Pelagic deposit.
  • 1 and 2
  • Only 2
  • Only 3
  • None of these
Which one of the following is a correct sequence in the increasing order of salinity concentration?
  • Gulf of California-Baltic Sea-Red Sea-North Sea
  • Baltic Sea-North Sea-Gulf of California-Red Sea
  • Red Sea-Gulf of California-North Sea- Baltic Sea
  • North Sea-Gulf of California-Baltic Sea- Red Sea
Identify the odd ones out in relation to the process of upwelling in the ocean?
  • Benguela current
  • Canaries current
  • Peru current
  • Oyashio current
Which of the following seas are enclosed?
Andaman Sea
Aral Sea
Sea of Azov
Bering Sea
Select the correct answer using the codes given below.
  • 1 and 2
  • 3 and 4
  • 2 and 3
  • 1 and 4
Sargasso Sea is characterised by ___________.
  • very cold water
  • very warm water
  • highly saline water
  • typical marine vegetation
Which one of the following statements is correct?
  • Cold fronts move at slower rate than warm fronts and therefore cannot overtake the warm fronts.
  • Cold fronts normally move faster than warm fronts and therefore frequently overtake the warm fronts.
  • Cold fronts move at slower rate and eventually they are overtaken by the warm fronts.
  • Cold fronts move faster than warm fronts but they cannot overtake the warm fronts.
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