1. Food Chain What is a food chain? What is
A producer?
A consumer?
A herbivore?
A carnivore?
An omnivore?
In the food chain below what is the
Producer
Consumers

2. Food Web In the food web what are the
Top predators
Producers
Primary consumers
How many food chains are in the web?
If a disease wipes out the lobster population what will happen to the number of
Seals
Limpets

3. Pyramid Of Numbers The food chain can be shown as a pyramid of numbers
How would this pyramid have been worked out?

4. Pyramid Of Biomass A pyramid of numbers is not always the right shape.
A pyramid of biomass might be built.
A = Pyramid of Numbers
B = Pyramid of Biomass
How would this pyramid have been worked out? A B

5. Energy Loss at a Trophic Level
At each trophic level energy is lost.
This cow eats 100kJ of grass. Some is used to build new tissues and some is lost in excretion.
Where has the rest of the energy gone?
What is the max % of the cow’s diet that can be passed on to the next trophic level?

6. Farming and Food Chains
An area of land can produce more plant food than it can support animals for meat.
Think about these food chains:
Cereal  Human
Grass  Cow  Human
Why is arable farming more efficient than dairy farming?

7. http://www. youtube. com/watch