KS3 Environment W. Richards Worthing High School

Food Chains A 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 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… Producer fgfg Herbivore Consumer Primary consumer Secondary consumer Tertiary consumer Carnivore Top carnivore Omnivore Usually plants. Anything that takes energy from the sun. Animals that only eat plants An animal that eats producers An animal that eats primary consumers An animal that eats secondary consumers Eats only animals Not eaten by anything else Eats both animals and plants

A “Pyramid of 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