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Chemical Reactions and Equations
Question
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Distinguish between food chain and food web.

Answer

Food chain

Food web

1. The series or organisms taking part at various biotic levels form a food chain.

1. A network of food chains with intercrosses and linkages is called the food web.

2. Trophic level of each organism is fixed in a particular food chain. Each organism in one trophic level receives food from one group of organisms.

2. In a food web, several food chains are interconnected. So, each organism in one trophic level receives its food from more than one group of organisms.

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Some More Questions From Chemical Reactions and Equations Chapter

What are some of the waste materials that we generate in our homes?

How much time does it take for certain commonly used products to biodegrade, when they are scattered around as litter?

The food we eat is digested by various enzymes in our body. Why the same enzyme does not breakdown everything we eat? What significance does this have for degradation of waste material?

Mention some substances that are biodegradable?

Why are some substances biodegradable and some non-biodegradable?

Give any two ways in which biodegradable substances would affect the environment.

Give any two ways in which non-biodegradable substances would affect the environment.

What are various components of the ecosystem?

An aquarium is known as an artificial ecosystem. Why?

Give examples of herbivores, carnivores, omnivores and parasites.