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?

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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

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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