The Effect of Light on Photosynthesis

The Effect of Light on Photosynthesis

Aim:My aim was to investigate how light affected photosynthesis.

Prediction:My prediction is that the closer the weed is to the light

the faster the photosynthesis as light acts as a catalyst which speeds

it up.

Bibliography: For my work I used the internet and certain science

books for info.

Hypothesis:Photosynthesis is a process by which green plants and

certain other organisms use the energy of light to convert carbon

dioxide and water into the simple sugar glucose. In doing so,

photosynthesis provides the basic energy source for virtually all

organisms. An extremely important by product of photosynthesis is

oxygen, on which most organisms depend.

Factors that affect Photosynthesis

· Light affects the rate of photosynthesis, it is the main energy

source, and this is what we are testing in this investigation.

· Carbon Dioxide is a raw material which affects the rate of

photosynthesis

· Water also affects the rate of photosynthesis; this water mostly

comes from the roots.

· Chlorophyll is the miracle molecule which actually makes

photosynthesis

The word equation for photosynthesis is:

Carbon Dioxide + Water Light Glucose + Oxygen

[IMAGE] 6CO2 + 6H2O Chlorophyll C6H12O6 + 6O2 + Energy

Things needed for Photosynthesis

· Light

· Carbon Dioxide

· The right Temperature

Apparatus: For my experiment I will need:

· A boiling tube

· Water

· A spatula

· Sodium Hydrogen Carbonate

· A beaker (200ml)

· A lamp (240v)

· Pond weed

· A ruler

· A stopwatch

Method:

1. First I took a boiling tube and I filled ¾ of it with water,

2. Then I added ½ a spatula of sodium hydrogen carbonate to the water

and mixed it, this is so it has carbon dioxide in the water.

3. Then I placed a piece of pond weed inside the boiling tube and left

it for 1 minute to let it get used to its surroundings.