Que-Ans: [2 Marks Each]

Question 12 Marks

European ports remain busy even during winter.

Answer

The Gulf Stream is divided into two branches along the western European coast.

One of these branches is in the $UK.$ Flows south of Spain through the banks of the Na.

While the other branch flows north to Iceland and Norway.

Due to the warm currents in the Gulf, the coast of Western Europe is open in winter because it is not covered with ice.

So the ports of Western Europe are busy even in winter.

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Question 22 Marks

Ocean currents affect the temperature of sea water.

Answer

Ocean currents are of great importance to human beings.

Warm currents carry tropical heat farther north and south.

While cold currents lead to the cold equator of the poles.

In this way ocean currents help maintain the balance of sea water temperature.

Rainfall occurs in some regions due to hot currents.

Warm currents warm temperatures near the shores of cold regions in high latitudes.

Western Euro ports remain operational even in winter due to the Gulf's hot currents.

Where hot and cold currents converge.

Very important areas for fishing activity have developed there.

Thus, ocean currents are useful to humans in many ways.

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Question 32 Marks

Temperature of Red Sea remain higher.

Answer

Temperatures in the confined and marine seas are higher or lower than those in the open seas. It is based on submerged mountains and coastal plains.

The Baltic Sea and the Hudson Bay have lower temperatures than the open sea due to the influence of the surrounding continents.

Overnight the sea is surrounded by deserts, so its temperature is high.

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Question 42 Marks

What are the effects of ocean currents?

Answer

Various effects of ocean currents:
$1.$ Hot currents the heat of the equator is drawn towards the cold regions of both the poles.
$2.$ Maintains seawater temperature balance.
$3.$ Warm currents on coastal areas help bring rain.
$4.$ Keeps beaches pollution free.
$5.$ Fishing thrives where hot cold currents accumulate.
$6.$ Ports remain open in winter in extremely cold regions of the north due to hot currents.

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Question 52 Marks

Is recruitment useful in many ways? Why?

Answer

Because recruitment is useful in many ways
$1.$ In many places large ships can be carried ashore at the time of maximum tide.
$2.$ Electricity can be generated using tide's water velocity
$3.$ Due to the high tide, there is no filling near the ports. Ports can stay clean. So the operation of the port is not stopped.
$4.$ Tidal oats are important for fisheries. Fishermen organize their work according to the schedule of tidal oats.
$5.$ The tidal waters are taken in wide agars near the shore. And salt is baked from it.

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Question 62 Marks

The salinity of coastal waters is not the same in all places.-Explain the statement.

Answer

The salinity of seawater depends on the rate of evaporation as well as the amount of fresh water received from rainfall, rivers, etc.
The salinity of the sea is higher if the evaporation is large and the freshwater inflow against it is low, whereas if the evaporation rate is low and the freshwater inflow is high then the salinity of the sea is low.
Thus, the salinity of coastal waters is not the same everywhere, as evaporation and freshwater inflows vary in different oceans.

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Question 72 Marks

Sea fishing is located in the east of Canada.-Explain the statement.

Answer

In the Atlantic Ocean, near the equator, the northern equatorial warm current begins and moves west.
Near Florida, this hot stream flows in a northeastern direction. Here it enters the Gulf of Mexico.
It is then known as the Gulf Stream.
Canada has a cold flow of Labrador to the east ahead of Newfoundland.
The result is a marine fishery off the east coast of Newfoundland, Canada, where the hot and cold currents meet.

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Question 82 Marks

Every full moon comes the greatest recruitment.-Explain the statement.

Answer

Every full moon and Amas day the sun, earth and moon come in a straight line.
So the gravitational pull of the sun as well as the moon produces larger waves of ocean water.
Every Poonam and Amas, the gravitational force of the Moon and the Sun on the Earth is moving in the same direction, so on that day there is a big tide.
On the eighth, when these forces seem to be perpendicular to each other on the earth, a small tide comes on that day.

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Question 92 Marks

Seawater temperatures are not the same everywhere.

Answer

When the sun's rays first fall on the surface of the ocean, the temperature of the surface water rises.
Then the heat spreads elsewhere under the influence of ocean currents, winds, etc.
Water is a shallow and transparent medium.
So the sun's rays can reach a depth of about $200$ meters in the ocean.
The sun's rays cannot reach deeper so there are$...........$ and the temperature decreases as we go deeper.
The seawater temperature is also not uniform everywhere due to the disparity in the addition of new fresh water to the seawater by rivers, glaciers.

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Question 102 Marks

Hot currents travel from the equator to the poles.-Explain the statement.

Answer

The main reasons behind the formation of ocean currents are the heat of the sun, prevailing winds, and the rotation of the earth.
As the direct rays continue to fall near the equator, there is more heat.
This warms the ocean water near the equator. The water here is heated.
And become lighter so their surface comes higher.
Due to this elevated surface, hot currents travel from the equator to the poles.

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Geography Que-Ans: [2 Marks Each]

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