So we did this high- tech experiment last week.
The aim of it was to find whether or not leaves need carbon dioxide for photosynthesis.
First we took a leaf from our sunflowers(poor them!:-( ) and stuck blu-tack onto their corners.
The vendor, Miss Wendy, helped us to put the leaf into a transparent plastic bottle.
We set the time on our datalogger to 30 minutes
One of us then gently blew into the bottle and another stuffed the c02 gas sensor into the neck of the bottle.
While we waited, Justin went to look at the frogs while the rest of us took candid photos.
The results were GoOd.
Miss Tan even said our experiment was most accurate!><
At first the green line slanted upwards but it steadily slanted down.
I think it meant that the level of carbon dioxide was decreasing.
I don't know how to 'look' at it but miss Tan said it was good.
I wonder why?o.0
Hi,
ReplyDeleteof course it weas good! The gentle blow was done by Ainul!! =)
The green line slanted upwards as Ainul's gentle blow increased the amount of carbon dioxide in the bottle. It decreased as the carbon dioxide was being used up! =) Some groups' graphs weren't accurate as they were affected by external factors such as the wind power from the fan. Somehow your group didn't face that problem! Thumbs up! =)
Miss Tan