NCERT Class 6 Social Science Chapter 2 Questions and Answers Oceans and Continents

Oceans and Continents NCERT Class 6th SST Chapter 2 Question Answer

Oceans and Continents Class 6 Questions and Answers

Let’s Explore

Question 1.
What are the circular lines in each map called? And do you know what the lines radiating out of the two poles are called? (Hint: you studied them in the previous chapter, but here they are presented differently.) (Page 29)
Answer:
The circular lines in each map are called – parallels of latitudes. Lines radiating from the two poles are called – Meridians of longitudes.

Question 2.
Which hemisphere holds more water? (Page 29)
Answer:
The Southern Hemisphere holds more water than the Northern Hemisphere.

Question 3.
What do you think could be the approximate proportion of water to land in the Northern Hemisphere? And in the Southern Hemisphere? Discuss in groups. (Page 29)
Answer:

• Northern Hemisphere: The proportion of water to land 40% land, 60% water.
• Southern Hemisphere: The proportion of water to land 20% land, 80% water.

Question 4.
Are all the oceans connected with one another, or are there separations between them? (Page 29)
Answer:
Yes all the five Oceans are interconnected.

• Some are connected via the Arctic Ocean. Example: the narrow water body named. Berring Strait connects the Pacific and the Arctic Ocean.
• Still others are connected by the narrow gap between the land masses of South America and the Antarctica.

Question 5.
Locate the five oceans and, in the table below, mark the hemisphere or hemispheres they belong to figure.

Answer:

Question 6.
Counting the numbers of squares, name the largest continent and the smallest. (Page 36)
Answer:
Largest continent Asia and smallest continent Australia.

Question 7.
Which-one is larger — North America or South America? Africa or North America? Antarctica or Australia? (Page 36)
Answer:

• South America is larger than North America.
• Africa is larger than North America.
• Antarctica is larger than Australia.

Question 8.
Re-colour the diagram by having a single colour for Europe and Asia and rename the result as ‘Eurasia’. Compare its size with South America’s. (Page 36)
Answer:
Eurasia (54 squares) is three times the size of South America (18 squares).

Question 9.
Write down the list of continents from the smallest to the largest. (Page 36)
Answer:
List of smallest to the largest continents.

• Australia
• Europe
• Antarctica
• North America
• South America
• Africa
• Asia.

Think About it

Question 1.
If there is such abundance of water on the planet, why is there so much talk of ‘water scarcity’ or a ‘water crisis’? (Page 31)
Answer:
The oceans together hold 3/4th of the water available on our planet.

• But the seawater is salty and unfit for consumption by most animals and humans.
• Fresh water (3%) fit for consumption constitutes only 1.2% and is available only in rivers and lakes.
• The rest is locked up in glaciers, ice caps and buried deep under the ground (groundwater).
• As there is limited availability of fresh water, we need to use it judiciously i.e. with care.
• Other contributing factors which are adding to the scarcity are –
  • Climate change and natural calamities like droughts and floods.
  • Increased human consumption.
  • Pollution of available resource over-use and wastage.
  • Increased global demand due to population increase and resource intensive economic development.

Question 2.
What ways of saving water are you aware of? Which ones have you seen practised at home, at your school, and in your village, town or city? (Page 31)
Answer:
Water being a precious gift of nature, and an essential and scarce resource needs to be used judiciously.
Home :

• Take shorter showers and mostly with bucket and mug.
• Fix leaks.
• Turn off tap and also not put the ’ tap full on.
• Turn off water i.e. not let taps run while brushing teeth or while shaving.
• Do rain water harvesting in which rain water from terrace veranda goes in underground pit through separate piping.
• Mapping the floor instead of washing.
• Reusing water used for cleaning vegetables for plants.
• Ensuring the water tank does not overflow when it is being filled.
• Running washing machine only with full load.
• Wiping the cars with wet mop instead of using hose for cleaning cars.
• Low flow flush toilets.

Or

School:

• Turn off water tap after use.
• Report of tap or pipes leaking.
• Form a water action plan team.
• Encourage students to use refill water bottles and educate them to pour their leftover, water in pots or the play field.
• Raise awareness among students about importance of water by preparing colourful posters on water use and water saving.
• Avoid flushing the toilets unnecessarily.
• Dispose waste like tissues in dustbins rather than in the toilet.
• Designate a water saving week in school calendar to spread awareness and save water.

Or

Village/Town/City.

• Harvest and reuse water
• Educate and engage community to harvest and store water.
• Check for openings or leaks in water distribution pipes.
• Better irrigation practices like drip irrigation.
• Invest in water harvesting by digging ponds, canals or installing water catching ducts.
• Replenish ground water by building and restoring infrastructure in villages.
• Safe disposal of water waste.
• Support revival of traditional water bodies.

Questions, Activities and Projects (Pages 39-40)

Question 1.
Explain the following terms:
(a) Continent
(b) Ocean
(c) Island
Answer:
(a) Continent: A large continuous expanse of land is called a continent. Example: Asia, North America.
(b) Oceans: Vast water bodies on the surface of the earth are called oceans. Example: Pacific Ocean, Indian Ocean.
(c) Island: Some smaller places of land surrounded by water on all sides are called Islands. Example: Lakshadweep Islands, Andaman and Nicobar Islands.

Question 2.
Let us draw – Without looking at the maps in this chapter, draw the continents free hand on a sheet of paper and colour them. Then compare your drawing with the map of oceans and continents in the chapter.
Answer:
Do it yourself.

Question 3.
Let us. do – On the outline map of the world given below, label all the continents and oceans.

Answer:

Question 4.
Solve the crossword.

Across
1. Abundantly produced by the oceans
3. A large expanse of landmass
6. A large continent of which India is a part
8. A major source of pollution of the oceans
10. The coldest continent

Down
2. The largest island on Earth
4. A huge destructive wave from the ocean
5. The smallest continent
7. The largest body of water on the Earth
8. A landmass (but not a continent) surrounded by the sea or ocean
Answer:

Class 6 Social Science Question Answer

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