Pretty much, you need to
-cut 20 leaf disks and place in a syringe
-add approx 1.5g of sodium bicarbonate to 300ml of water, with 2 drops of liquid detergent and stir gently (ensuring there are no bubbles)
-draw 15-20ml of the sodium bicarbonate/detergent solution into the syringe (leaf disks should float)
-hold the syringe upwards and expel the air; stop before the solution comes out of the tip.
using your index finger to seal the tip of the syringe , create a vacuum by pulling on plunger (10 sec)
- simultaneously , release index finger; some leaf disks should begin to sink.
Then, pt 2
-add remaining solution to 2 small beakers and separate 10 disks in each
-use one beaker, exposed to light and one exposed to no light while using the timer
-record observations ; wanting to see how long it will take for all disks to rise to the top (with light exposure)
My question is, what would the DV and IV (and CV) be in this case? I have an idea but need reassurance. Thanks
Mod edit: You already posted this in another thread, so I deleted one and left this one here. Please only ask the question in one place -- Calebark