Unit 4 Period 4 The web of life

Unit 4 Period 4 The web of life •

The species of the living world are connected, which means they cannot live alone. For example, if there are many plants in an area, there will be plenty for insects to eat. The insects will do well and increase in numbers. The birds will notice this and arrive to eat the insects. The birds will do well and get fat. Some of the birds will be caught and eaten by small animals. The small animals are then eaten by bigger animals.

1 - What does the phrase ( the living connection )mean? Species can not live alone. 2 - How do insects increase ? ……………………………… They eat plants and increase in numbers. 3 - What do birds eat ? ……………………………… They eat insects.

Food Chain Plants insects Small animals Big animals

This is called a ‘food chain’ because each species is linked to others, like a chain. However, it is more than a chain because even the largest animals will die at some time. Insects and other animals will then feed off their dead bodies. Eventually, what is left will go into the soil and encourage plants to grow. It is more like a circle than a chain so is sometimes called the ‘circle of life’

- Why ' food chain ' called like that? Because each species is linked. /? . . . . . 5 - What will happen when the biggest animals die? ? . . . Insects and animals will feed off their dead bodies. .

In fact, it is more complex than this because living things depend on each other in many ways. Insects, birds and animals live in plants or trees. Some insects live on the bodies of animals and birds. Plants need insects, birds and animals to spread their seeds so that they can make new plants. So species are connected in many ways, and that

Why is it called sometimes ' web of life? Because species are connected in many ways.

When the web is broken by humans, it has consequences that nobody can predict. The cane toads of Australia are a good example.

What are three expressions used in the text to explain connections between living things? ▸ Food chain circle of life web of life Which one do you think is the best to describe connections in nature? Why?

What’s the difference between' web of life and food chain ? When species is linked together like chain , we call this food chain. When species are connected in many ways , we call this web of life.

Species: • starling • Background: • Starling are small birds that eat insects and seeds. They were named in the plays of William Shakespeare , so Eugene Schieffelin wanted to have them in North America. 100 birds were released in New York in 1890. Starling have many babies each year, and now millions of starlings are found all over the USA. Consequences: • Starlings cause harm to crops. • They carry some disease • They often fly in large numbers near airports, which is dangerous for planes. • •