Which of the following is produced when dead plant material decays in the absence of air?

  • chlorofluorocarbons (CFCs)
  • methane
  • carbon monoxide
  • lead compounds

Which two main gases are produced when you burn a piece of wood?

  • oxygen and nitrogen
  • carbon dioxide and oxygen
  • carbon dioxide and carbon monoxide
  • carbon dioxide and nitrogen

Which of the following is true about ozone?

  • light blue in colour
  • odourless
  • not harmful
  • not a pollutant

Which of the following is a powerful irritant which can aggravate the symptoms of people who suffer from respiratory disorders?

  • sulphur dioxide
  • carbon monoxide
  • carbon dioxide
  • oxides of nitrogen

How much cooler does the air get for every 1 km increase in altitude in the troposphere?

  • 2 degrees
  • 6.5 degrees
  • 8 degrees
  • 10 degrees

Which of the following is produced when electrical discharges pass through oxygen in the air?

  • chlorofluorocarbons
  • methane
  • ozone
  • lead compounds

The outer layer of the thermosphere is

  • ionosphere
  • exosphere
  • mesosphere
  • stratosphere

Height of troposphere is

  • 10 Km
  • 12 Km
  • 50 Km
  • 80 Km

The occurrence of weather is in

  • troposphere
  • stratosphere
  • mesosphere
  • thermosphere

What is meant by the term 'meso'?

  • top
  • middle
  • turning
  • changing

What is the source of lead compounds?

  • aerosol sprays foams
  • exhaust fumes of motor vehicles
  • incomplete burning of wood
  • none of above

The atmosphere is divided into how many layers?

  • two
  • three
  • four
  • five

How much higher can be the temperature inside a greenhouse as compared to the outside?

  • 20 °C higher
  • 10 °C to 15 °C higher
  • 5 °C higher
  • 25 °C higher

Minimum temperature of the troposphere is

  • 17 °C
  • −55 °C
  • −5 °C
  • 1800 °C

The temperature of the outer mesosphere is

  • 93 °C
  • −93 °C
  • ;5 °C
  • −5 °C

If silk clothes are left in the open air for a week or so, their color fades because of

  • sulphur dioxide is converted into sulphur trioxide
  • dirt
  • carbon monoxide
  • nitrogen oxides

Height of thermosphere is

  • 50 Km
  • 80 Km
  • above 80 Km
  • 30 Km
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0