Starter –What’s different about these food

chains?

What impact do you think this difference will have on the top consumer?

Why do we always eat Herbivores?

Objective: to list where energy is lost in a food chain and use this information to explain why we rear herbivores for foodGood

• You can list where energy is lost in a food chain

Better

• You can describe the three different methods of farming

Best

• You can explain why we rear herbivores for food

Energy LossYou can list

where energy is lost in a food

chain

Use the sheet to help you label the

cow

What energy goes in?

What is wasted and how?

Why do we always eat Herbivores?

Objective: to list where energy is lost in a food chain and use this information to explain why we rear herbivores for foodGood

• You can list where energy is lost in a food chain

Better

• You can describe the three different methods of farming

Best

• You can explain why we rear herbivores for food

Different Farming Methods

• Around the room are 3 different posters about the 3 types of farming

• Visit the posters and complete the worksheet

You can describe the

three different methods of

farming

Your OpinionYou can

describe the three different

methods of farming

Why do we always eat Herbivores?

Objective: to list where energy is lost in a food chain and use this information to explain why we rear herbivores for foodGood

• You can list where energy is lost in a food chain

Better

• You can describe the three different methods of farming

Best

• You can explain why we rear herbivores for food

Why is it better to eat herbivores?

1J of energy enters the

human

10J of energy enter the cow

100J of energy enter the

grass

You can explain why we rear

herbivores for food

0.1J of energy enters the big bird

1J of energy enters the small bird

10J of energy enter the caterpillar

100J of energy enter the plant

Why do we always eat Herbivores?

Objective: to list where energy is lost in a food chain and use this information to explain why we rear herbivores for foodGood

• You can list where energy is lost in a food chain

Better

• You can describe the three different methods of farming

Best

• You can explain why we rear herbivores for food

To Finish

Energy Loss

Battery FarmingChickens kept

tightly packed in

small cages to stop them

moving

300 eggs produced a

year

Given antibiotics to

prevent disease running

through the entire barn

Hens tightly packed to help keep

them warm – no need for

feathers

Barn FarmingLots of hens in one big

room – slightly more

space to move

Approx. 280 eggs per year per chicken

Heated barn to reduce need for feathers

Given antibiotics to

prevent disease running

through the entire barn

Free Range FarmingLots of room

to move about – open

space and not too many

chickens

No heating so feathers

needed to keep warm

Approx 250 eggs per year per chicken

No drugs give unless

necessary – not much risk

of all chickens

being infected