1:What is meant by aerosol?

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2:List two basic functions of food chain in the ecosystem?

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3:What are planktons? 

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4:What are functions of an ecosystem?

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5:In which zone of atmosphere,ozone layer is present?

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6:The number of trophic levels in a food chain is limited.why? 

1. Aerosol is a substance enclosed under pressure and able to be released as a fine spray, typically by means of a propellant gas.

2. Food chain creates the nutritional relationships amongst the different biotic components of an ecosystem.

•  It transfers the energy by the sequential interlinking of organisms.

4. Ecosystem is a structural and functional unit of the biosphere and it is comprising living organisms and their non living environment that interact by means of food chains and chemical cycles resulting in energy flow, biotic diversity and material cycling to form a stable, self supporting system.

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