Environments

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Slide 1

environments

food helps all living things to grow

all energy comes originally from the sun

habitat is the

normal home of

living things

Slide 2

environments

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FILL IN THE MISSING WORDS

Slide 3

environments

producers and consumers

Green plants are called PRODUCERS because they can make

their own food.

Animals eat food because they cannot make their own food.They

are called CONSUMERS.

CONSUMERS that eat plants are called HERBIVORES.

Animals that eat other animals are called CARNIVORES.They

prey on other animals.

5. Consumers that eat plants or animals are called OMNIVORES.

Slide 4

environments

food chains and food webs

leaf

earthworm

shrew

owl

Slide 5

environments

An example of a food web can be seen on the next slide.

food webs

Slide 6

Slide 7

ENVIRONMENTS FOOD CHAINS AND WEBS

Energy loss in food chains and webs

The more steps we have in a food chain ,the the less energy

is used for growth.Most of the energy is used for movement

and to keep things warm.

The further up a food chain we go,the less animals there are.

Food webs are all the chains in a habitat put together.

4. Food webs allow us to study environmental changes.

Slide 8

environments

changing food webs

Some food webs can change for short periods e.g. when there

is a shortage of rain ,a river bed may dry up but the plant and

animal life will survive.

When conditions are changed permanently, some animals

can be lost forever.They are said to be extinct.

Animals adapt to their environments, e.g. worms like dark damp

conditions.Try to think of other examples.

4. Food webs can be changed in several ways.

Slide 9

environments

changing food webs

Reasons for change

PREDATION Predators that eat smaller animals mean that

these smaller animals breed more quickly.

DISEASE Disease in an area can mean that the lack of

one type of animal can affect other types.

COMPETITION The introduction of one type of animal can