5 Questions
What gas is observed escaping from the leaves of the Hydrilla plant during the experimental investigation?
Oxygen
What happens to the number of bubbles when the Hydrilla plant is kept away from sunlight?
Decrease
What is the purpose of covering the Hydrilla plants with a glass funnel during the experimental investigation?
To create a controlled environment
Why is a test tube full of water inverted over the stem of the funnel in the experimental setup?
To collect any gases produced by the plant
How does the rate of photosynthesis change when the experimental setup is kept in sunlight compared to when it's kept away from sunlight?
Increases in sunlight, decreases in shade
Study Notes
Investigating Photosynthesis
- To investigate how light affects the rate of photosynthesis, an experiment can be set up using Hydrilla plants, a beaker, water, and a test tube.
Experimental Procedure
- Fill a beaker three-quarters with water and add some Hydrilla plants.
- Cover the plants with a glass funnel.
- Invert a test tube full of water over the stem of the funnel.
- Place the arrangement in sunlight.
Observations
- Bubbles of a gas (oxygen) will be observed escaping from the leaves of the plant when it is in sunlight.
- When the plant is moved away from sunlight, the number of bubbles will decrease.
Conclusion
- The rate of photosynthesis is affected by light, with more photosynthesis occurring in the presence of sunlight.
- This is evident from the increased number of bubbles (oxygen) observed when the plant is in sunlight.
Learn about the impact of light on the rate of photosynthesis in Hydrilla plants through a simple experimental investigation involving a beaker, Hydrilla plants, water, and sunlight. Observe the gas bubbles escaping from the leaves as a result of photosynthesis.
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