Q1. Fill in the blanks.
i. Life exists in the ________________.
ii. ___________is the only continent through which the tropic of Cancer, the Equator and the Capricorn pass.
iii. ____________is the world’s longest mountain range.
iv. ________________is called an island country.
v. The world’s longest river the _______flows through Africa.
vi. The Arctic Ocean is connected with the Pacific Ocean by a narrow stretch of shallow water known as ______________.
vii. Europe lies to the _________of Asia.
i. The Atlantic Ocean is ‘S’ shaped. _________
ii. Biosphere is one of the layers of the Atmosphere. __________
iii. The South Pole lies almost at the centre of Antarctica. ________
iv. Africa is the second largest country after Asia. _________
v. Pacific Ocean is ‘L’ in shape. __________
vi. The coastline of Atlantic Ocean is highly indented. __________
vii. The atmosphere is composed mainly of nitrogen and argon. ________
Q3. Why nitrogen considered as a significant gas?
Q4. Name the three main components of the environment.
Q5. Name the oceans that surround the continent North America.
Q6. Which two oceans surround South America on the east and the west?
Q7. Why Carbon dioxide (CO2) is considered as an important constituent of air?
Q8. Why oxygen is so important?
Q9. Write the name of Indian research stations in Antarctica.
Q10. State the percentage of the earth which is covered with water.
Q11. What percentage of earth’s water found in oceans?
Q12. Which is the world’s longest river?
Q13. Name the world’s largest river.
Q14. Which is the world’s largest hot desert and where is it located?
Q15. In which hemisphere does Asia lie?
Q16. Which two oceans surround South America on the East and the West?
Q17. Write the names of the continents that surround the Pacific Oceans.