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Chapters
2: Locating Places on Earth
3: Movements of the Earth
4: Structure of the Earth
5: Rocks
6: Landforms of the Earth
7: Earthquakes
8: Volcanoes
9: Weathering and Denudation
▶ 10: Hydrosphere
11: Composition and Structure of Atmosphere
12: Insolation
13: Atmospheric Pressure and Winds
14: Humidity
15: Pollution-Types and Sources
16: Effects of Pollution
17: Pollution—Preventive Measures
18: Natural Regions of the World
*: Map Based Questions
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Solutions for Chapter 10: Hydrosphere
Below listed, you can find solutions for Chapter 10 of CISCE Rachna Sapra for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई.
Rachna Sapra solutions for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई 10 Hydrosphere SOLVE AND SCORE [Pages 100 - 102]
Multiple Choice Questions (MCQs):
Which one of the following ocean currents flows in the Atlantic Ocean?
Oyashio
Alaska
Benguela
California
Which of the following is a warm ocean current?
Oyashio
Alaska
Peru
California
An exceptionally high tide reflects which phase of the moon?
New Moon
Full Moon
It can be either full moon or new moon
It can be first quarter or third quarter of the moon
Tides take place due to ______.
Gravitational Force
Centrifugal Force
Both gravitational force and centrifugal force
Neither gravitational force nor centrifugal force
Coriolis force comes into action due to ______.
Rotation of the Earth
Revolution of the Earth
Change of seasons
Variation in temperature
Which of the following factors affect the movement of the ocean currents?
Planetary Winds
Coriolis Force
Variation of Temperatures
All of these
Gulf Stream flows along ______.
West coast of North America
East coast of North America
West coast of Europe
East coast of South America
What is a gyre?
Warm Current
Hot Spring
Circular motion of Ocean Water
High Tide
Due to Coriolis effect, the ocean currents get deflected towards their right hand side in ______.
Northern Hemisphere
Southern Hemisphere
Pacific Ocean
Atlantic Ocean
The average temperature of ocean water is ______.
27° C
17° C
30° C
35° C
Which of the following is an example of vertical movement of the ocean waters?
Waves
Tides
Currents
All of these
What percentage of water is found as ground water?
97.25
2.05
0.68
0.01
Average salinity of ocean water is ______ parts of salt in 1,000 parts of water.
27
35
50
100
Which of the following types of tides will be experienced on the New Moon?
High tide
Low tide
Spring tide
Neap tide
A ship is waiting in the deep waters. It is waiting for the next high tide so that it can enter the harbour of the port. Can you guess which of the following ports it is waiting to enter?
London
Mumbai
Cape Town
Kolkata
Which of the following statements does not reflect a significance of tides?
Tides help in the distribution of heat.
Tides help the ships to enter the shallow harbours.
Tides help to harness electricity.
Tides help to keep the shores clean.
Identify the ocean current from the information given below.
- It is a cold current.
- It flows in the North Atlantic Ocean.
- It develops rich fishing ground when it meets the warm Gulf Stream.
Canary current
Falkland current
Labrador current
Benguela current
Assertion-Reason Based Questions: Four options are given for each question. Choose the correct option for your answer.
Assertion (A): Salinity of Caspian Sea is higher than that of the Pacific Ocean.
Reason (R): Caspian Sea is an enclosed sea while the Pacific Ocean is an open ocean.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): The temperature of surface water is higher than the temperature at the bottom of the ocean.
Reason (R): The unequal heating sets up conventional currents in the water bodies.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): As the waves approach the shore, they slow down.
Reason (R): The force of friction acts between the wave and the sea floor.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): Every water body experiences high tide and low tides.
Reason (R): The gravitational pull of the Sun causes the water to rise up.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Assertion (A): Cold currents move towards the poles.
Reason (R): The ocean currents are caused due to the differential heating by the solar energy.
Both A and R are true and R is the correct reason for A.
Both A and R are true but R is not the correct reason for A.
A is true and R is false.
A is false and R is true.
Source-based Questions:
Read the given passage and answer the following questions.
| The ocean water experiences periodic rise and fall in its level. This movement of water is called Tides. When the level of the sea water rises near the coast, it is said to experience High tide and when the water level recedes back towards the sea, it is said to experience Low tide. The difference between the water level of high tide and low tide is called Tidal Range or Amplitude. Every water body experiences two high tides and two low tides during the span of 24 hours. The high tides and the low tides alternate each other, meaning that a tide is experienced almost every six hours. In olden times, people in the coastal area used to note time according to the movement of tides. When the water rises during the high tide, it is called “flood tide” and when it recedes, it is called “ebb tide”. |
- Are the tides an example of horizontal or the vertical movement of ocean water?
- Why are the tides often referred to as the periodic movement of ocean water?
- How do people in the coastal area record time according to the rise and fall of the tides?
Answer the following questions.
What are ocean currents?
Name a few important ocean currents of the Pacific Ocean.
Name two horizontal movements of ocean water.
Define the following term:
Spring tide
Define the following term:
Neap tide
Mention the factors affecting ocean currents and their circulation.
What is gyre?
How does the salinity of ocean water affect the ocean currents?
What are tides?
Name the two forces responsible for causing the tides.
Mention the time difference between two high tides.
“Ocean waters are always in motion.” Name the different movements of ocean water.
In what ways warm ocean currents are different from cold ocean currents?
“The ocean water is saline and not fit for human consumption.” What does the term salinity of ocean water mean? What is the average salinity of ocean water?
How is the movement of ocean current influenced by the prevailing winds?
Why the ocean currents of Southern Hemisphere flow in anticlockwise motion?
Name the important ocean currents of Atlantic Ocean.
What is Coriolis Effect?
How does the coriolis effect affect the ocean currents?
Name the cold ocean current which affects the fishing industry of Japan.
Discuss the significance of tides.
Define the term tidal range.
How is the neap tide different from the spring tide?
“Water can neither be created nor destroyed”. Do you agree with the statement? Justify.
How are the waves different from the tides?
How does Gulf Stream current originate?
How it forms dense fog at the coast of Newfoundland?
List two prime impacts of ocean currents.
Draw a well labelled diagram of spring tide.
Draw a well labelled diagram of neap tide.
Give a reason for the following:
Warm currents produce a milder climate.
Give reasons for the following:
Each day a tide is delayed by 26 minutes.
Name the ocean currents which are responsible for bringing rainfall to the following places.
British Isles, British Columbia, Japan, Australia, South Eastern coast of Africa
What is common about these ocean currents?
The Atacama Desert in South America and the Kalahari desert in Africa receive very little rainfall due to the effect of ocean currents. Name the ocean currents responsible for this. Also mention the common features between the two currents.
Solutions for 10: Hydrosphere
Rachna Sapra solutions for जॉग्रफी [इंग्रजी] इयत्ता ९ आईसीएसई chapter 10 - Hydrosphere
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