Igcse chemistry paper 6. IGCSE Chemistry 2022-12-12
Igcse chemistry paper 6 Rating:
Photosynthesis is the process by which plants, algae, and certain bacteria use sunlight to convert carbon dioxide and water into glucose and oxygen. This process is essential for the survival of plants and is the primary source of energy for most living organisms. In this lab, we will be using floating discs to investigate the role of light in photosynthesis.
To begin the lab, you will need to gather a few materials, including a light source, floating discs, and a test tube. You will also need a steady hand and good eyesight to accurately measure and record your observations.
To set up the experiment, start by filling the test tube with water and adding a small amount of baking soda. This will create a basic solution, which is necessary for the floating discs to remain buoyant. Next, place the floating discs in the test tube and position the light source so that it is shining directly on the discs.
Once the experiment is set up, it is time to begin collecting data. Observe the floating discs over a period of time, taking note of any changes in color or movement. You may also want to measure the oxygen levels in the test tube using a dissolved oxygen meter.
As the light source shines on the floating discs, the chloroplasts within the discs will absorb the energy from the light and use it to power the process of photosynthesis. This will result in the production of glucose and oxygen, which will cause the discs to change color and move more actively within the test tube.
In conclusion, the floating discs photosynthesis lab is a simple and effective way to investigate the role of light in photosynthesis. By observing the changes in the floating discs over time, you can gain a better understanding of how plants and other photosynthesizing organisms use sunlight to produce energy.
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Cambridge IGCSE Chemistry Paper 6 (Alternative to Practical) Marking » Skolatis
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Cambridge IGCSE Chemistry 0620/61 Mark Scheme May/Jun 2019
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