Chapter 3- Food Chain and Food Web

The Food Chain

Every living thing needs energy in order to live. Everytime animals do something (run, jump) they use energy to do so.


Animals get energy from the food they eat, and all living things get energy from food. Plants use sunlight, water and nutrients to get energy (in a process called photosynthesis). Energy is necessary for living beings to grow.

A food chain shows how each living thing gets food, and how nutrients and energy are passed from creature to creature. Food chains begin with plant-life, and end with animal-life. Some animals eat plants, some animals eat other animals.

A simple food chain could start with grass, which is eaten by rabbits. Then the rabbits are eaten by foxes. 

Bigger Food Chains
Here's another food chain, with a few more animals. It starts with acorns, which are eaten by mice. The mice are eaten by snakes, and then finally the snakes are eaten by hawks. At each link in the chain, energy is being transferred from one animal to another.

There can be even more links to any food chain. Here another animal is added. It goes

Grass to grasshopper to mouse to snake to hawk.