Question

(i) Classify the following substances- wood, paper, plastic and grass.
(ii) Give a detailed account of your classification.

Answer 1

Wood, paper, and grasses are the biodegradable substances while the plastic is the nonbiodegrable substance.

Biodegradable substances are those which are broken down by the biological process of microbes. Wood, paper and grasses are broken down due to these actions. Non biodegradable substances are those which are not broken down by the biological action of the microbes. Plastic is not broken down due to the actions.