Through the Oceans Class 6 Notes Questions and Answers Social Science Chapter 10

By reviewing Kerala Syllabus 6th Standard Social Science Notes Pdf English Medium and Class 6 Social Science Chapter 10 Through the Oceans Notes Questions and Answers Kerala SCERT Solutions, students can improve their conceptual understanding.

Class 6 Social Science Chapter 10 Through the Oceans Notes Questions and Answers

Class 6 Social Science Through the Oceans Notes Questions and Answers

Class 6 Social Science Chapter 10 Question Answer Kerala Syllabus

Question 1.
Complete the concept map after observing the given pictures.


Answer:

Question 2.
What are the water sources that we use for our daily needs?
Answer:

• Spring
• Well
• Borewell
• River

Question 3.
Complete the list related to the Pacific Ocean.

Answer:

Major islands	The deepest point	Continents bordering the ocean
Philippines, Japan, Hawaii and New Zealand	The Challenger Deep in the Mariana Trench	Asia, Australia, North America and South America

Question 4.
Prepare the identity card of Atlantic Ocean. Ans:

Answer:

Question 5.
Read the news headlines given below. Which is the ocean bordering this port?

Answer:
Indian Ocean

Question 6.
Find the countries that share their borders with the Indian Ocean, using an atlas or a globe.
Answer:

• Africa: South Africa, Kenya, Tanzania, Somalia, Mozambique, Madagascar, Comoros, Mauritius, and Seychelles.
• Asia: India, Pakistan, Iran, Oman, Yemen, Bangladesh, Myanmar, Thailand, Malaysia, Singapore, Maldives, Sri Lanka and Indonesia.
• Oceania: Australia and East Timor (Timor-Leste).

Question 7.
Complete the worksheet related to oceans.
Answer:

Oceans	Position in size	Deepest point/ Part	Major islands
Southern Ocean	Fourth position	The Factorian deep in the South Sandwich Trench	Dolleman and Heard
Arctic Ocean	Smallest Ocean	The Molloy Deep
Pacific Ocean	Largest Ocean	The Challenger Deep in the Mariana Trench	Philippines, Japan, Hawaii and New Zealand
Atlantic Ocean	Second largest	The Milwaukee Deep in the Puerto Rico Trench	Newfoundland and Iceland
Indian Ocean	Third largest	Java Trench	Andaman and Nicobar Islands, Lakshadweep, Maldives and Sri Lanka

Question 8.
Let us complete the concept map.

Answer:

Question 9.
How do oceans iniluence our lives? List after earnining the picture.

Answer:

• Regulates the climate
• Support tourism
• Provide a livelihood through fishing
• Maritime transportation helps in maintaining international trade

Question 10.
Prepare theme songs related to water conservation.
Answer:
(Hints)
Turn off the tap, don’t let it flow,
Plant more trees and watch them grow.
Keep our lakes and streams so clean,
For a healthy world, fresh and green.

Through the Oceans Questions and Answers Extended Activities

Question 1.
Collect more information on oceans and their features and prepare a digital presentation.
Answer:
(Hints)
Step 1: Start with a title slide
Step 2 : Explain the features of each ocean
Step 3: Include water cycle
Step 4: Add the importance of oceans .
Step 5: Add conservation measures
Step 6: Include Pictures and Map
Step 7: Conclusion

Question 2.
Prepare a digital album on news and pictures related to water pollution.
Answer:
(Hints)
Step 1: Create a Title Page .
Step 2: Collect Recent News (River pollution, Ocean plastic pollution, Industrial waste in water bodies)
Step 3: Add relevant Pictures
Step 4: Add Captions Under Each Picture
Step 5: End with a Conclusion Page

Question 3.
Organise an elocution competition on the topic ‘Ocean and Human beings’ under the auspices of the Social Science Club, on World Ocean Day.
Answer:
(Hints: Organise an elocution competition by using the given steps)
Step 1: Decide the Details (Date, Time, and Venue)
Step 2: Registration of Participants
Step 3: Arrange Judges
Step 4: Prepare the Programme
Step 5: Announce Results
Step 6: Vote of Thanks

Through the Oceans Class 6 Notes Pdf

Std 6 Social Science Through the Oceans Notes

• Water is one uf the major components that retains life on the earth. .
• Seventy one percent of the earth’s surface is covered with water.
• The hydrosphere is the total mass of water found in the earth’s surface, interior and atmosphere in solid, liquid and gaseous state.
• The water in the hydrosphere moving cyclically through the processes of evaporation, condensation and precipitation is known as watercycle.
• 97% of water on earth is saline water. Only 3% of total water on earth is fresh water.
• Oceans are vast water bodies that are situated among continents.
• Seas and bays are parts of oceans.
• The scientific study of oceans is known as Oceanography.
• World Ocean Day is observed on June 8 every year.
• The Pacific Ocean is the largest and deepest ocean. About one third of the earth’s surface is covered by this ocean.
• The Atlantic Ocean is the second largest ocean. It appears like the letter ‘S’ in the English alphabet. The Indian Ocean is the only ocean named after a country. This is the third largest ocean in the world. The ocean that surrounds Antarctica is the Southern Ocean.
• The Arctic Ocean is situated mostly within the Arctic circle.
• Waves are movements created by the wind on the surface of the ocean.
• In addition to the waves, ocean water movements include high tides, low tides and ocean currents. High tides and low tides are phenomena of rising and falling of sea level at fixed intervals. The rise in the sea level is called a high tide and the fall is called a low tide.
• Ocean current is a phenomenon by which water flows through the ocean in a fixed direction through a fixed path. Such currents are there in all the oceans.
• Factors such as the wind, variations in the temperature and salinity of the ocean, and the rotation of the earth are some of the reasons that influence ocean currents.
• Human beings have depended on oceans for their livelihood since ancient times.
• Dumping of chemicals and other dangerous substances are a threat to the marine ecosystem.

Introduction
The chapter “Through the Oceans” helps us understand the vast water bodies that cover most of our planet and play an important role in our lives. It explains the major oceans of the world, their special features, and the different movements of ocean water such as waves, tides, and currents. The chapter also describes important processes like evaporation, condensation, and precipitation, which show how oceans are linked to the water cycle. By learning about oceans, we discover how they influence climate, support rich marine life, and provide valuable resources for human beings. It also reminds us of the need to protect oceans from pollution and overuse. This chapter helps us appreciate the importance of oceans and encourages us to care for them for a healthier planet.

WATER

• Water is one of the major components that retains life on the earth. Seventy one percent of the earth’s surface is covered with water.
• As a result of circulation of water (water cycle) in the hydrosphere water in the water sources do not get depleted despite its use.
• The hydrosphere is the total mass of water found in the earth’s surface, interior and atmosphere in solid, liquid and gaseous state.

Sources of Water

Water Cycle
Water cycle is the continuous circulation of water on the earth, under its surface and in the atmosphere.

• The different sources of water on the earth turns into vapour through evaporation. The vapour thus formed becomes clouds through condensation. In addition to clouds, fog and dew are other forms of condensation.
• Water droplets from the clouds reach the earth, through precipitation. Rain, snow fall and hailstones are the different forms of precipitation.
• The water in the hydrosphere moving cyclically through the processes of evaporation, condensation and precipitation is known as watercycle.
• Water is an inevitable factor for the survival of life. But the distribution of water is not the same everywhere on Earth.

• 97% of water on earth is saline water. Only 3% of total water on earth is fresh water. A major quantity of this fresh water lies frozen in ice sheets and glaciers. Hence, very limited amount of fresh water is available for living beings.
• Just like fresh water, marine water is also essential for the existence of human beings.
• Oceans play a vital role in regulating the weather and supporting habitats. It also provides resources essential for human life.

Evaporation: The process by which a liquid changes into gaseous form with the help of heat. Condensation: The process by which water vapour in the air cools to form water.

Precipitation: The process by which water particles fall on earth as the clouds cannot hold it further , due to its increased weight and size, as a result of continuous condensation.

OCEANS
Oceans are vast water bodies that are situated among continents.
Seas and bays are parts of oceans. The scientific study of oceans is known as Oceanography. Oceanography helps in understanding the complex movement of water in oceans. Moreover, the study helps in addressing challenges like climate change, ocean pollution and depletion of biodiversity. Oceans play a vital role in sustaining life on earth.

World Ocean Day

• World Ocean Day is observed on June 8 every year.
• The main objective of this day is to realise the importance of oceans in our life. The unscientific intervention of human beings affects the marine habitat adversely. Therefore, this day reminds us of the need to conserve oceans.
• Sea : A part of ocean that is partially surrounded by land is called a sea. E.g: The Arabian Sea
• Bay: A bay is a part of the ocean that extends into the land. E.g: The Bay of Bengal
• Strait: A strait is a narrow strip of water that connects two seas or oceans and is located between land areas. E.g: The Palk Strait

1. Pacific Ocean
The name ‘Pacific’ was given by Ferdinand Magellan, an explorer. Magellan called it ‘Mar Pacifico’ which means ‘peace’. He named it ‘Pacific’ because he felt that it was calmer than the Atlantic Ocean.

• The Pacific Ocean is the largest and deepest ocean. About one third of the earth’s surface is covered by this ocean.
• Asia, Australia, North America and South America are the continents that are bordered by the Pacific Ocean.
• The largest number of islands are found in this ocean. Philippines, Japan, Hawaii and New Zealand are some of the major islands in the Pacific.
• The Challenger Deep in the Mariana Trench located in the Pacific Ocean is the deepest point on the earth. Several trenches and active volcanoes are the features of this ocean.
• Point Nemo is the farthest point on ocean from the land. From this point, one has to travel more than 2000 kms to reach the nearest point on land. Point Nemo is situated in the Pacific Ocean.

2. The Atlantic Ocean

• The Atlantic Ocean is the second largest ocean. It appears like the letter ‘S’ in the English alphabet. The busiest sea route in the world is situated in the Atlantic Ocean.
• The oceanic ridge called the Mid-Atlantic Ridge situated in the middle of the ocean is another feature of the Atlantic. The Milwaukee Deep in the Puerto Rico Trench is the deepest point. Newfoundland and Iceland are some of the important islands in the Atlantic Ocean. North America, South America, Africa and Europe are the continents that are bordered by the Atlantic Ocean.

3. Indian Ocean
The Indian Ocean is the only ocean named after a country. This is the third largest ocean in the world. Africa, Asia and Australia are the continents lying close to the Indian Ocean. The Bay of Bengal and the Arabian Sea are parts of the Indian Ocean. Java Trench is the deepest part in this ocean. Andaman and Nicobar Islands, Lakshadweep, Maldives and Sri Lanka are major islands in this ocean. The Malacca Strait connects the Indian Ocean and the Pacific Ocean.

4. The Southern Ocean

• The ocean that surrounds Antarctica is the Southern Ocean.
• The Southern Ocean surrounds Antarctica to almost 60° South Latitude. This ocean shares its borders with all the oceans except the Arctic Ocean.
• The Southern ocean is fourth in position with regard to its size. Dolleman and Heard are some of the islands in this ocean. The Factorian deep in the South Sandwich Trench is the deepest point in this ocean.

5. The Arctic Ocean

• The Arctic Ocean is situated mostly within the Arctic circle.
• The North Pole is in the Arctic Ocean. This is the smallest and shallowest ocean. This area is mostly frozen throughout the year. The Molloy Deep is the deepest point in this ocean. The Arctic Ocean is the northernmost border of Asia, Europe and North America.

OCEAN AND MOVEMENTS

• Waves are movements created by the wind on the surface of the ocean.
• The energy flow generated by the wind creates ups and downs on the surface of the sea. Waves are usually formed when the wind blows over the surface of the water. These continuous ups and downs of the ocean water are called waves. The size of the waves increases with respect to the increase in the speed of the wind. In addition to the waves, ocean water movements include high tides, low tides and ocean currents.
• High tides and low tides are phenomena of rising and falling of sea level at fixed intervals. The rise in
  the sea level is called a high tide and the fall is called a low tide.
• Like rivers, water in the ocean is flowing through it for several kilometres. Ocean current is a
  phenomenon by which water flows through the ocean in a fixed direction through a fixed path. Such currents are there in all the oceans.
• Factors such as the wind, variations in the temperature and salinity of the ocean, and the rotation of the earth are some of the reasons that influence ocean currents.
• Mineral salts are dissolved in water from all sources. But, the amount of salts in seawater is comparatively high. That is why seawater remains salty. Salinity is the total amount of all the mineral salts dissolved in water.

High tide and Low tide
The gravitational force of the sun and the moon and the centrifugal force result in the rise and fall of the sea level that are called high tide and low tide. High tides are caused by the gravitational force on the side of the earth that faces the moon and due to centrifugal force on the opposite side at,the same time. Low tides are experienced on other parts of the earth at this time.

OCEANS AND HUMAN BEINGS
Oceans are the sources of precious resources. Human beings have depended on oceans for their livelihood since ancient times.

• Along with seafood, oceans provide other resources as well.
• Maritime transportation helps in maintaining international trade.
• The oceans play a significant role in regulating global warming and producing oxygen.
• Coasts are also popular tourist destinations.

OCEAN POLLUTION
Oceans face several challenges. Pollution is the greatest issue. Dumping of chemicals and other dangerous substances are a threat to the marine ecosystem. Not only oceans, but also fresh water sources like rivers, lakes etc., are affected by pollution.

Ways to Conserve Oceans
It is essential to conserve the marine ecosystem, which is home to a great variety of animals and plants ranging from micro-organisms to the blue whale. Misuse of water and its pollution is a threat to the existence of life on the earth.

• Prevent plastic, chemicals etc., from reaching the oceans.
• Keep the coast free from pollution.
• Create awareness on conservation of ocean.
• Control unsustainable fishing.
• Preserve the marine ecosystem
• Use renewable energy to reduce ocean warming.