Datalogger Experiment

During the experiment, we observed that the graph went down beacause the leaves were taking in carbon dioxide and increasing oxygen for photosynthesis. We also concluded that plants take in carbon dioxide for photosynthesis. The leaves gave out water vapour too. That experiment was fun and meaningful. We put the leaves in the a container and used a torch to shine on it. We used blue tacks to stick the leaves inside the container.
Besides that, we went to take the height and numbers of leaves today. The height of the Singapore sunflower was 42cm and 18 leaves. The height of the Taiwan sunflower was 24cm and 17leaves. We wished that the sunflower could grow faster.

Using datalogger to measure the intake of carbon dioxide by plants 220409

Measuring our sunflowers 150409

PBL --- Checking and Action

Observation --- Some parts of the flower have absorbed the red and blue dye. We saw that most of the flower absorb the blue dye. We also see that the flower keeps on falling. Prediction --- We predicted that half of the flower was red while the other half was blue. But most of it was blue and lesser of it were red. We think that the blue dye is going faster beacause the blue dye is a stronger colour. Our prediction was correct. To improve further, we can cut the stalk shorter.

Our Singapore sunflower is growing faster than the Taiwan sunflower, it has 12 leaves and 24cm. The Taiwan sunflower has 8 leaves and 14cm.

Jia Hao and Kim

PBL 080409

Checking on our seedlings and start of PBL 010409

Planting of sunflower seeds 250309