1. How do plants feed?

2. Carbon dioxide + Water  Glucose + oxygen
Photosynthesis
Carbon dioxide + Water  Glucose + oxygen
Plants make their own food

3. What controls the rate of Photosynthesis?
Understand that a range of factors will affect the rate of reaction.
Objectives
Understand the term ‘limiting factor’

4. Jobs:
Manager, cutter, colourer, assembly, quality control.
Shop:
Scissors cost 5 T-shirts
Crayon cost 1 T-shirt each
Sellotape costs 3 T-shirts
Patterns cost 2 T-shirts.
The T-shirt Factory
Work as a team to make as many T-shirts as possible.
At the end of each work period you must ‘sell’ your T- shirts to the buyer.
You may then buy more tools if you wish.
The winning team is the one which sells the most T-shirts.
Sellotape tab
T-shirts must have a front and a back that match.
The design must be coloured in well.

5. What happened? What held you up initially?
What was the most effective thing to buy?
Was it always the same factor which held you up?
If you could change one thing at the start what would it be?

6. Space Station Farming
You are part of a team designing a lunar space stations.
Your task is to design the agriculture module which will provide all of the fruit and vegetables for the colony.
Design the module to help the plants grow as fast as possible. Label and explain your design features.

8. True or False
The most important factor to a plant is the light intensity?
The limiting factor on the rate of photosynthesis is always the factor in shortest supply.
Only 0.04% of the air is CO2. On a hot, sunny day the best way to increase the rate of photosynthesis of plants in a greenhouse is to increase the concentration of CO2 .
On a cold sunny day the best way to speed up growth is to warm the plants.
False – it depends
True
True – plenty of light and warmth CO2 is in short supply
True – plenty of light but chemical reactions are slow in the cold.False – it depends