Plan two investigations to show that plants use carbon dioxide and release oxygen during photosynthesis, using video, including what materials you need, what data you collect, and what procedures to follow.

Question

Evaluate your results.

when finished you will type a
A complete lab report with plans for both investigations, details about how you conducted the investigations what data you collected, what concluded, and a summary of your knowledge of gas exchange.

Put it in 4 sentences,

In 7th graders words.

Answer 1

Investigation 1: Materials needed - a potted plant, a transparent container, a small fan, a light source, a video camera. Procedure - Set up the plant inside the container with the fan blowing gently on it. Position the camera to record the plant. Place the light source close to the plant and turn it on. Record the plant for a certain time period. Data collected - time-lapse video showing the changes in the plant over time. Conclusion - The video will show that the plant absorbs carbon dioxide from the air and releases oxygen during photosynthesis.

Investigation 2: Materials needed - a water-filled glass container, a water plant (such as Elodea), a light source, a gas syringe, a rubber stopper with two holes, a video camera. Procedure - Place the water plant in the glass container and cover it with the rubber stopper. Insert the gas syringe into one hole of the stopper and the light source into the other hole. Start recording with the camera. Allow the light to shine on the plant and observe the movement of the gas in the syringe. Data collected - time-lapse video showing the movement of gas bubbles from the plant to the syringe. Conclusion - The video will demonstrate that the plant releases oxygen bubbles during photosynthesis.

Evaluation: After conducting both investigations, carefully review the videos and observe the changes and movements in the plants. Analyze the data collected and compare it with the expected outcomes. If the videos clearly show the plants releasing oxygen bubbles or growing and changing over time, this would support the hypothesis that plants use carbon dioxide and release oxygen during photosynthesis.