Page 6 - ACTIVE SCIENCE 4 TOC

smaller animals. For example, crops are eaten by rats, rats are eaten by snakes
and snakes are eaten by eagles. This chain that shows the interdependence of one
animal on another for food is called the food chain.

Food Chain

Plants and animals co-exist to survive. They are dependent on each other. Carbon
dioxide, oxygen, water, food and nutrients are exchanged between plants and animals.

Carbon Oxygen
dioxide

Plants and Animals Depend on Each Other

The exchange of oxygen and carbon dioxide creates
the inter-relationship between plants and animals. Let’s Pronounce Together

This relation creates the balance in nature. If the food chain oxygen carbon
number of plants decrease, the oxygen level will dioxide photosynthesis

decrease leading to increase in the level of carbon chlorophyll
dioxide. This will lead to extreme changes in weather.

Factual Study

• Some plants are carnivores. They get some nutrients by eating various small
insects and spiders. A well-known example of a carnivorous plant is the Venus Flytrap.

• The average strawberry has 200 seeds. It is the only fruit that bears seeds on the
outside.

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Active Science-4