KS3 Environment

1. KS3 Environment W. Richards Worthing High School

2. The arrows show which way the energy is going in the chain Food Chains A food chain shows what is eaten by what…

3. Food webs Food webs contain many interlinking food chains…

4. e.g take out the crab: What would happen if an animal or organism was “taken out”? • The flat winkles would not get eaten, so their population would…? • The herring gulls would have less food, so their population would probably…? increase decrease

5. Top carnivore Secondary consumer Primary consumer Producer

6. Some definitions… 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 An animal that eats secondary consumers Eats only animals Not eaten by anything else Eats both animals and plants Producer fgfg Herbivore Consumer Primary consumer Secondary consumer Tertiary consumer Carnivore Top carnivore Omnivore

7. 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:

8. A pyramid of numbers for this food chain would look like this: One owl Some voles Lots of grass

9. Another example: Consider the food chain: GrassRabbitFoxFleas Lots of fleas One fox Some rabbits Lots of grass