Air quiz

The most abundant gas in the atmosphere is:

The layer of the atmosphere where weather occurs is the:

The ozone layer is found in the:

Meteorites burn up in the:

Radio waves are reflected back to the Earth by the:

The loo is a:

Air pressure is highest at:

Rainfall caused when moist air rises over mountains is:

The incoming solar energy received by the Earth is called:

The average height of the troposphere is about:

Why is the stratosphere ideal for flying aeroplanes? (2 marks)

What is the importance of nitrogen and oxygen for living things? (2 marks)

Why does temperature decrease with height in the troposphere? (2 marks)

What are trade winds? (2 marks)

Name the instrument used to measure (i) air pressure (ii) rainfall. (2 marks)

What is the difference between low and high pressure areas? (2 marks)

How is the monsoon a seasonal wind? (2 marks)

Why is the ozone layer important? (2 marks)

What happens when water vapour in the air cools? (2 marks)

Why are the equatorial regions hot? (2 marks)

At sea level the temperature is 25 degrees C. Using a fall of 6.5 degrees C per km, find the temperature at the top of a hill 2 km high and at the top of a 6 km mountain. (3 marks)

In a sample of 1000 litres of air, find the volume of nitrogen (78 percent), oxygen (21 percent), argon (0.93 percent) and the remaining gases. (3 marks)

The monthly rainfall of Mumbai (in mm) is roughly: Jun 500, Jul 840, Aug 580, Sep 340. Find the total rainfall in these four months and the average per month. (3 marks)

The stratosphere extends from about 13 km to 50 km, and the mesosphere from 50 km to 80 km. Find the thickness of each layer. Which is thicker and by how much? (3 marks)

The temperature at a desert town was 45 degrees C at 2 pm and 18 degrees C at 4 am. Find the daily range. Explain why the range is so high in deserts. (3 marks)

Read the passage and answer the questions. Delhi faces thick smog in November. The air quality index often reaches the "severe" category, and schools are sometimes closed. (i) What is smog? (ii) Name two sources of air pollution in Delhi. (iii) Suggest two remedies. (5 marks)

Read the passage and answer the questions. In May, hot, dry winds called loo blow across Rajasthan, Punjab and Uttar Pradesh during the afternoon. People stay indoors and drink plenty of water. (i) What type of wind is the loo? (ii) Why is it dangerous? (iii) Suggest two precautions. (5 marks)

Read the passage and answer the questions. The monsoon winds blowing from the Arabian Sea strike the Western Ghats, bringing heavy rain to the coast, while the region on the eastern side gets much less rain. (i) Name the type of rainfall. (ii) Why does the eastern side get less rain? (iii) What is the dry side called? (5 marks)

Read the passage and answer the questions. Scientists observed that the average temperature of the Earth has risen by about 1 degree C in the last century, and glaciers are melting. (i) Which gas is mainly responsible? (ii) Name this rise in temperature. (iii) Give two effects of melting glaciers. (5 marks)

Read the passage and answer the questions. In equatorial regions, the morning is sunny, but by afternoon clouds form and heavy rain falls with thunder, almost every day. (i) Name this type of rainfall. (ii) Why does the air rise? (iii) Why does it rain in the afternoon? (5 marks)

Describe the five layers of the atmosphere with a labelled diagram. (6 marks)

Explain the three types of rainfall with labelled diagrams. (6 marks)

Explain the composition of the atmosphere and the importance of each main gas. Draw a pie chart. (6 marks)

Explain the three types of winds (permanent, seasonal, local) with examples, and draw a diagram of land and sea breezes. (6 marks)

Explain the greenhouse effect with a labelled diagram and discuss its link with global warming. (6 marks)