How Does Light intensity affect the rate of Photosynthesis?
Introduction
All green plants need to be able to make their own food. They do this by a
process called photosynthesis. For this to occur they need sunlight
energy. This energy is absorbed by a green pigment called chlorophyll, which
is mainly found in the leaves. This energy then combines with water molecules
from the soil and carbon dioxide from the air. Then, as a result of this, a
type of sugar is produced .This is called glucose. Oxygen is also made.
For my experiment I have chosen to use light distance as my variable. This
means that to carry out a fair test everything else must be kept the same
during the experiment.
Prediction
I think that as the light source is moved closer to the pond weed, the more bubbles will be produced. This is because the light will be more intense and therefore increase the rate of photosynthesis as the intenser the light; the faster the rate of photosynthesis. This will act as a catalyst therefore increasing the speed that the plant would convert carbon dioxide and water into glucose and oxygen. The light will also be shining on a greater surface area of the pondweed and will therefore also increase photosynthesis.
Introduction
All green plants need to be able to make their own food. They do this by a
process called photosynthesis. For this to occur they need sunlight
energy. This energy is absorbed by a green pigment called chlorophyll, which
is mainly found in the leaves. This energy then combines with water molecules
from the soil and carbon dioxide from the air. Then, as a result of this, a
type of sugar is produced .This is called glucose. Oxygen is also made.
For my experiment I have chosen to use light distance as my variable. This
means that to carry out a fair test everything else must be kept the same
during the experiment.
Prediction
I think that as the light source is moved closer to the pond weed, the more bubbles will be produced. This is because the light will be more intense and therefore increase the rate of photosynthesis as the intenser the light; the faster the rate of photosynthesis. This will act as a catalyst therefore increasing the speed that the plant would convert carbon dioxide and water into glucose and oxygen. The light will also be shining on a greater surface area of the pondweed and will therefore also increase photosynthesis.
