KS3 EnvironmentKS3 Environment

W. Richards

Worthing High School

Food ChainsFood ChainsA food chain shows what is eaten by what…

The arrows show which way the energy is going in the

chain

Food webs contain many interlinking food chains…

Food websFood webs

1) The flat winkles would not get eaten, so their population would…?

2) The herring gulls would have less food, so their population would probably…?

What would happen if an animal or organism was “taken out”?

e.g take out the crab:

increase

decrease

Top carnivore

Secondary consumer

Primary consumer

Producer

Some definitions…Some definitions…Producer

fgfgHerbivoreConsumerPrimary consumerSecondary consumerTertiary consumerCarnivoreTop

carnivore

Omnivore

Usually plants. Anything that takes energy from the sun.Animals that only eat plantsAn animal that eats producersAn animal that eats primary consumers

An animal that eats secondary consumers

An animal that eats secondary consumers

Eats only animalsNot eaten by anything elseEats both animals and plants

A “Pyramid of A “Pyramid of Numbers”Numbers”

A pyramid of numbers shows how many animals or organisms we are talking about.

For example, consider the following food chain:

A pyramid of numbers for this food chain would look

like this:

Lots of grass

One owl

Some voles

Another example:

Consider the food chain:

Grass Rabbit Fox Fleas

Lots of grass

One fox

Some rabbits

Lots of fleas