In year 9 we are currently learning about plants!
Last week, the girls carried out an investigation to test for presence of starch in leaves that have been exposed to light and leaves that have been kept in the dark. First, the leaves had to be soaked in ethanol and placed in a hot bath to remove chlorophyll (you know that chemical in plant cells that gives leaves the colour green). The girls then used iodine to test for starch. The leaves that turned dark blue/black tested positive for presence of starch.
Which leaves do you think turned dark blue/black and what's PHOTOSYNTHESIS got to do with it?
The one on the left is clearly positive for starch!
Looking impressed and amazed :P
She took her goggles off only for the photo snap!
The nicest water bath you've seen in Science!
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| Soaked in Ethanol! |
cool experienment. cant wait to do them next year!
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