i. Life exists in the biosphere zone.
ii. Africa is the only continent through which the tropic of Cancer, the Equator and the Capricorn pass.
iii. The Andes is the world’s longest mountain range.
iv. Australia is called an island country.
v. The world’s longest river the Nile flows through Africa.
vi. The Arctic Ocean is connected with the Pacific Ocean by a narrow stretch of shallow water known as Berring Strait.
vii. Europe lies to the west of Asia.
i. The Atlantic Ocean is ‘S’ shaped. True
ii. Biosphere is one of the layers of the Atmosphere. False
iii. The South Pole lies almost at the centre of Antarctica. True
iv. Africa is the second largest country after Asia. True
v. Pacific Ocean is ‘L’ in shape. False
vi. The coastline of Atlantic Ocean is highly indented. True
vii. The atmosphere is composed mainly of nitrogen and argon. False
Ans. Nitrogen is considered as a significant gas because it helps in the growth of living organisms.
Ans. The three main components of the environment are lithosphere, atmosphere and hydrosphere.
Ans. Oceans that surround the continent North America are Pacific Ocean, Atlantic Ocean and Arctic Ocean.
Ans. On the east –Atlantic Ocean and on the west – Pacific Ocean
Ans. Carbon dioxide (CO2) is important as it absorbs heat radiated by the earth, thereby keeping the planet warm. It is also essential for the growth of plants.
Ans. Oxygen is essential for our survival because oxygen is the breath of life.
Ans. Maitri and Dakshin Gangotri are the Indian research stations in Antarctica.
Ans. More than 71 percent of the earth is covered with water.
Ans. More than 97% of the Earth’s water is found in the oceans.
Ans. The world’s longest river is Nile which flows through Africa.
Ans. Amazon is the world’s largest river.
Ans. The Sahara Desert, the world’s largest hot desert, is located in Africa.
Ans. The continent Asia lies in the Eastern Hemisphere.
Ans. Atlantic Oceans surrounds South America on the East and Pacific Ocean surrounds on the West.
Ans. Asia, Australia, North and South Americas surround it.
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