Morning Star solutions for टोटल जियोग्राफी [इंग्रजी] इयत्ता ९ आयसीएसई chapter 11 - Hydrosphere [Latest edition]

Hydrosphere refers to the combined mass of water

Water is not usually thought of as a solid, and only a small fraction of the Earth's water is in a solid state, in the form of ice. This ice includes all forms of frozen water, from the ice sheets at the North and South poles to icebergs, ice on the top of mountains, frozen lakes in the winter, or even the ice in a freezer. Though all the ice on earth is part of the hydrosphere, the frozen aspect is known as the cryosphere. This frozen water is three-fourths of the earth's freshwater, which makes it quite important. Identify other sources of fresh water.

Underground water is found in ______.

Assertion (A): Waves are oscillatory movements on the surface of the sea.

Reason (R): Waves result from the action of wind on the surface of the sea.

Name the rise and fall of sea water due to the gravitational forces of the sun and the moon:

The difference in height between high tide and low tide is called ______.

Apogee : Earth-moon distance ______ : : Perigee : Earth-moon distance ______

Study the diagram and identify A and B.

Assertion (A): Tidal range is not constant.

Reason (R): Tidal range varies due to the earth's rotation on its axis.

Which of the following statements are true?

1. The alternate advance and retreat of seawater along a coast is called tide.
2. When water advances to its fullest extent on to the shore it is called high tide.
3. When water recedes to its fullest extent from the shore it is called low tide.
4. Some freshwater rivers and lakes can have tides too.

______ flow from the lower latitudes towards the higher latitudes.

Which amongst the following is NOT one of the causes of Ocean Currents?

The water from the Atlantic ocean flows over the Mediterranean sea because ______.

Name the winds that blow between the Equator and the Tropics.

What is the direction of air circulation over the oceans in the middle latitudes?

Assertion (A): Gulf stream flows in a clockwise direction.

Reason (R): In the Northern Hemisphere curren ts flow in a clockwise direction.

Name the warm Atlantic Ocean Current which keeps the ports of Great Britain ice free even in winters.

Assertion (A): The Labrador Current remains frozen for nine months.

Reason (R): The cold Arctic Current is responsible for frozen seas of the Labrador Current.

Identify the Warm Currents flowing in the Atlantic ocean.

The Gulf Stream Current is deflected towards the east as a result of the earth's rotation and the westerlies to become the ______.

Assertion (A): The water which gets collected under the surface of the land, known as underground water, remains in soil, sub-soil or bedrock.

Reason (R): The water from precipitation, that is from rain or snow flows on the surface.

Assertion (A): On the seventh or eighth day of every fortnight a neap tide, which is lower in height than a low tide, occurs.

Reason (R): The tide producing forces of the sun and the moon work in opposite direction causing a low tide.

Which current is also known as the ‘Black Stream’?

Name the current that keeps the hub of world trade, the Port of Montreal, open all year round.

Which currents have created one of the world's richest fishing grounds?

Assertion (A): Warm currents flow from the low latitudes in Tropical Zones towards the high latitudes.

Reason (R): They bring warm water into cold water areas.

Assertion (A): The air circulation over the oceans in the middle latitudes is mainly anticyclonic.

Reason (R): The oceanic circulation pattern corresponds with the circulation of air.

Currents influence which of the following?

Name any two ways in which movement of ocean water takes place.

What are tides?

Name one factor that causes tides.

What is the time interval between tides? Name the factors responsible for this time interval.

What are Spring?

What are Neap tides?

Mona had gone to visit her friend's boat on the Visakhapatnam jetty. She was surprised to see that the boats seemed to have sunk because the water level in the jetty was low and the gangways to the boats were almost vertical. As a student of geography name and explain the phenomena that caused this.

Name two types of ocean currents based on their temperature. Give an example of each.

For what is the Gulf Stream famous?

What happens when warm and cold currents meet?

Tara had gone to Canada to visit her cousins staying in Newfoundland. Her cousins took her to the seaside where they encountered heavy fog. As a student of geography Tara explained the cause of the fog. What did Tara say? What is the main occupation of the people in that place?

How are tides formed?

Differentiate between High Tides and Low Tides.

Give reasons for the following:

There are two high and two low tides in a day.

Give reasons for the following:

Each day a tide is delayed by 26 minutes.

Give reasons for the following:

The tidal range differs from one water body to the other.

Draw a well labelled diagram showing the formation of spring and neap tides.

Name two types of ocean currents based on their temperature. Give an example of each.

State any two factors responsible for causing the currents.

Give a reason for the following: 

Warm currents produce a milder climate.

Give reasons for the following:

The eastern coasts of the USA are comparatively cold.

Give reasons for the following:

The coasts of Norway are not frozen in winter whereas its adjoining coasts are frozen for most parts of the year.

Describe one effect of the following ocean current.

Labrador Current of the Atlantic Ocean.

Describe one effect of the following ocean current.

The Kuroshio current

Describe one effect of the following ocean current.

Oyashio Current of the Pacific Ocean.

State the origin and flow of the Gulf Stream.

What is the effect of Gulf Stream on the coasts of North America?

What is the effect of Gulf Stream on the coasts of Western Europe?

Give reasons for the following:

The waters of the Oyashio Current form the richest fishing grounds in the world.

Give reasons for the following:

There is heavy rainfall in Queensland but the Atacama desert is arid.

Give reasons for the following:

Rich fishing grounds are located on the Pacific coast of North America.

Describe three major effects of currents.

You are watching the sea waves from the balcony of a seaside resort in Mumbai on a New Moon Day. Suddenly you noticed rise of sea water and its movement towards the coast. What was this wave and after how much time will it be repeated?

Imagine that the Ocean Currents stop flowing. What would be its consequences for the human beings?

On an outline map of the world name and show the direction of one warm and one cold current each of the Pacific Ocean and the Atlantic Ocean.

Give a diagrammatic representation of the process of the rise and fall of tides.