Q1. Fill in the blanks.
i. _____________layer is the most important layer of the atmosphere.
ii. As we go up the layers of atmosphere, the __________falls rapidly.
iii. The____________, ____________and ____________are the permanent winds.
iv. Cold air is ____________ and____________.
v. The air pressure is ____________at sea level and ____________with height.
vi. The upper most layer of the atmosphere is known as _____________.
i. When air is heated, it expands, becomes lighter and goes up. _______
ii. High pressure is associated with clear and sunny skies. _______
iii. All living beings on this earth depend on the atmosphere for their survival. _______
iv. Carbon dioxide is the most plentiful gas in the air. ________
v. Green plants produce oxygen during photosynthesis. _________
vi. The air pressure is highest at sea level and decreased with height. _______
Q3. In which layer of the atmosphere do aeroplanes fly?
Q4. Where do meteors burn up in the atmosphere?
Q5. What is atmosphere?
Q6. What is the instrument that measures the amount of rainfall?
Q7. What is the instrument that measures the atmospheric pressure?
Q8. What is the wind vane used for?
Q9. Which layer of the atmosphere makes radio communication possible?
Q10. Name the instrument which measures temperature.
Q11. What is the standard unit of measurement for temperature?
Q12. Who invented the celsius scale of temperature?
Q13. What is the freezing and boiling point of water in celsius?
Q14. What is weather?
Q15. Which gas protects us from harmful sun rays?
Q16. Which layer of the atmosphere is free from clouds?
Q17. What is rain?
Q18. What is loo?
Q19. Why do green plants use carbon dioxide?
Q20. What is the role of the ozone layer?
Q21. What is temperature?
Q22. What is insolation?
Q23. Why is there no air pressure on moon?
Q24. What is humidity?