Brilliant light displays occurring in the northern hemisphere due to particles from the sun that enter ionosphere are called

Which layer is located above the stratosphere

Conditions are most variable in

Which of the following is not true about incineration?

Most of the mass of the atmosphere is contained in

Which of the following is the outermost layer of the atmosphere?

In which of the following regions do aircraft fly?

What is the extension of the exosphere above the surface of Earth?

Maximum temperature of the troposphere is

Which of the following is not an air pollutant?

What happens to the rates of ozone formation and destruction in the absence of outside intervention?

Amount of ozone contained by stratosphere is

Which of the following protects Earth's surface from being hit by most meteoroids?

What is meant by the term 'thermo'?

Which of the following is a poisonous gas?

What is the source of sulfur dioxide?

What is the source of oxides of nitrogen?

What is the source of carbon monoxide?

The thermosphere is hot up to

Which of the following is closest to the Earth's surface?