Planet earth

The most significant change in the development of the earth’s atmosphere was

• Conversion of CO2 into calcium carbonate

• Water condensation forming oceans

• Introduction of oxygen by the photosynthesising

  Life forms

• Volcanic eruptions

Composition of clean air contains ______% of argon gas

Name the process used for the production of ammonia and fertilisers by using Nitrogen

Diagrammatically explain the process of formation of acid 🌧️

"The main source of 'problem' gases is the burning of fossil fuels".

Do you agree with this statement? Why or why not?

Two main problem gases involved in the green house effect are

• Nitrogen and oxygen

• Sulphur and oxygen

• Carbon dioxide and nitrogen

• Carbon dioxide and methane

Describe the numerous effects of acid rain

Oxides of this gas when dissolved in rainwater produces acid rain

• Nitrogen

• Argon

• Sulphur

• Carbon dioxide

_____ is used to fill the 💡 filament

One of the solutions against air pollution is

• Using catalytic converter

• adding lime into lakes

• Photochemical smog

• Incomplete combustion