Question Words in English - Meaning and Uses 
Use of Has and Have Worksheets for Grade 1 -
Physical Science
What are biodegradable and non biodegradable wastes?Give 2 examples of each.
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Biodegradable wastes:
Biodegradable waste is a type of waste, typically originating from plant or animal sources, which may be degraded by other living organisms.
Biodegradable wastes are such waste materials which can be degraded by natural factors like microbes (e.g. bacteria, fungi and a few more), and abiotic elements like temperature, UV, oxygen, etc. Some examples of such wastes are food materials, kitchen wastes, and other natural wastes.
Microorganisms and other abiotic factors together break down complex substances into simpler organic matter, which eventually suspend and fade into the soil.
The whole process is natural, which can be rapid or slow.
The environmental issues and risks caused by biodegradable wastes are low.Examples: food waste, paper waste, manure, etc.
Non-Biodegradable wastes:
Waste that cannot be decomposed by biological processes is known as “Non-biodegradable wastes”.
Non-biodegradable wastes are those that cannot be decomposed or dissolved by natural agents. They remain on earth for thousands of years without any degradation.
The environmental issues and risks caused by biodegradable wastes are very high.Examples: cans, metals, plastic, etc.