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Seed Germination Index

Seed Structure
To find out if water is needed for seed germination
To find out if air is needed for seed germination
To see if temperature has an effect on the
germination of seeds

To see if light is needed for seeds to germinate
Summary of the Conditions needed for Germination
To see if Energy is given out by
Germinating Seeds

Germinating and Growing Seedlings
Looking at the Structure of a Seedling

Biology Practical Work index

 

To see if carbon dioxide is given off by germinating seeds

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PRACTICAL WORK

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Additional Experiments on Seed Germination

5. To see if carbon dioxide is given off by germinating seeds.

Method

1. Set up the apparatus as shown in the diagram below.

 

To see if carbon dioxide is given off by germinating seeds.

 

2. Leave the seeds for one week.

3. Observe the lime water after one week. Are there any changes? Record them

 

Results after one week

Test Tube

Appearance of the lime water after one week

Test Tube A

 

Test Tube B

 

Test Tube C

 

 

Conclusion:

Lime water is an indicator solution for carbon dioxide. In the presence of CO2, lime water becomes milky white. If the water became a milky white colour at the end of this experiment, it means that carbon dioxide was given out by the seeds as they germinated.

This means the seeds are respiring. The seeds use oxygen from the air to use up the food supplies stored in the seeds. In this process, carbon dioxide is given out. As the food is used, energy is given out that the seeds need to germinate and start to grow.

 

 

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