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6CO + H O C H O + 6H O + 6O

Student Photosynthesis Equation!

As a class, without looking in your notes, can you arrange a physical representation of the photosynthesis equation?

Coursework

Looking Ahead

Read ‘Section 3.5: Making and handling organic molecules’ from your Heinemann Biology 1 textbook.

Inputs vs Outputs

What the plant takes in

What the plant expells

Key questions

12, 13, 14, 15

Heinemann Biology 1, pg46

Worksheet

Reciprocal reactions – cellular respiration and photosynthesis

Heinemann Biology 1 WB, WS06

light energy

Six Carbon Dioxide (6CO2)

One Glucose (C6H12O6)

chlorophyll

Twelve Water (12H2O)

Six Water (6H2O)

Six Oxygen (6O2)

HINT: Does it balance?

Carbon Dioxide

Water

Glucose

Oxygen

Water

12

6CO + H O C H O + 6H O + 6O

2

12

6

In photosynthesis, light energy trapped by chlorophyll splits water molecules, releasing the oxygen to the air. The hydrogen then combines with carbon dioxide to form glucose.

How are carbon dioxide and water converted into oxygen and glucose?

What are the inputs and outputs?

Chloroplasts!!!

chlorophyll

  • The organelle where photosynthesis takes place is the chloroplast.

green pigment

  • Chloroplasts contain a that traps the light energy.

Photosynthesis Equation

Like mitochondria they have many folded layers of membrane

Photosynthesis can be summarised by the following equation:

location of the chloroplasts in the mesophyll cells

WHAT CAN YOU SEE?

Cells

Need Glucose!

Cellular Respiration.

  • As discussed previously, all cells need glucose for the process of

  • Animals get their glucose by eating other organisms.

  • Plants glucose using raw materials and a process called photosynthesis.

make their own

12

2

12

2

6

What is Photosynthesis?

light

energy

Photosynthesis is a process controlled by

Plants use

to perform a chemical reaction that changes

into

carbon dioxide

enzymes.

and water

glucose

and oxygen.

Other photosynthetic organisms (e.g. algae and trees) also perform this process.

SUCCESS CRITERIA:

  • I can WRITE a BALANCED CHEMICAL EQUATION to represent photosynthesis.

Trapping Sunlight:

Photosynthesis

(photo meaning 'light', synthesis meaning 'putting together')

LEARNING INTENTION:

  • To learn about the CHEMICAL PROCESS known as photosynthesis.
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