Food Webs

• Science
• Lower Secondary (Key Stage 3)

What do you know about food webs?

What is B?

1. Nucleus
2. Cytoplasm
3. Cell Membrane
4. Mitochondria

What is C?

1. Mitochondria
2. Cell Wall
3. Cell Membrane
4. Nucleus

What is the function of C?

1. Contains DNA
2. Respiration
3. Controls what enters and leaves the cell
4. Site of chemical reactions

What is the function of B?

1. Contains DNA
2. Respiration
3. Controls what enters and leaves the cell
4. Site of chemical reactions

Site of chemical reactions

Provides energy (respiration)

Contains genetic material

Controls what goes in/out

Nucleus

Cytoplasm

Cell Membrane

Mitochondria

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

Name the producer in the food web

Name two herbivores in the food web

How many secondary consumers are there?

Give a food chain using these organisms: rabbit, fox, grass

Which of fox, rabbit, grass is most likely to die from bioaccumulation?

Discuss: all secondary consumers are carnivores

What will happen to the ecosystem if the algae dies out?