Food Chains Revision

• Science
• Lower Secondary (Key Stage 3)

Food Chains

Nucleus

Chloroplast

Mitochondria

Cytoplasm

Cell membrane

Cell wall

Vacuole

Ribosome

Structure

Function

Controls what enters and leaves the cell.

Contains DNA and controls the cell processes.

The site of respiration.

The site of chemical reactions in the cell.

Protein synthesis (making proteins).

Storing cell sap and keeping the cell rigid.

The site of photosynthesis. Contains chlorophyll.

Protects and supports the cell.

Cell membrane

Chloroplast

Ribosome

Cell wall

Vacuole

Mitochondria

Nucleus

Cytoplasm

Producer or consumer?

1. Producer
2. Consumer

Producer or consumer?

1. Producer
2. Consumer

Producer or consumer?

1. Producer
2. Consumer

Producer or consumer?

1. Producer
2. Consumer

All animals are consumers.

1. True
2. False

What does a producer do? Name the process producers use.

Sort the organisms into the right box.

Producer

Consumer

How would you classify this Venus fly trap and why?

Which of these organisms are carnivores?

Carnivores

How would you classify humans?

How would you define the word 'prey'?

How would you define the word 'predator'?

Why is grass not prey?

All primary consumers are herbivores.

1. True
2. False

All apex predators are carnivores. True or false. Explain your answer.

Match the keyword to the definition.

An organism that only eats producers.

An organism that eats producers and consumers.

An organism that makes its own food.

An organism that only eats other consumers.

An organism that cannot make its own food.

Producer

Consumer

Herbivore

Omnivore

Carnivore

How would you categorise each organism? You can use 1 or 2 labels for each.

Consumer

Consumer

Producer

Herbivore

Omnivore

Carnivore

Polar bears are carnivores. Pandas are herbivores. Grizzly bears are omnivores. Compare what each bear eats.

What does the arrow show in a food chain?

Arrange these organisms into a food chain.

Where would you put decomposers?

What is wrong with this food chain?

Give 2 reasons why not all of the energy is available to the lion.

Identify:
1. A primary consumer
2. A producer
3. A tertiary consumer

Weddell seals live in Antarctica and eat squid. The seals are preyed upon by killer whales. The waters are full of producers called phytoplankton. They are eaten by shrimp. The squid eat the shrimp. 

Read the text and build the food chain.

Phytoplankton

Seals

Squid

Killer whales

Shrimp

Name the producer in the food web

Name two herbivores in the food web

How many secondary consumers are there?

Name a producer in this food web.

Name an apex predator in this food web.

Name a primary consumer in this food web.