Boy: OK floating leaf disk lab
you need 100 mL (milliliters) of water
1 gram of baking soda, syringe, some spinach
and a hole puncher and a light (heat lamp)        Girl: Okay so what we are trying to do in this lab is
trying to take the air out of the spinach leaves
and so they will sink
and at the end we will make them float again
the first thing we will do is hole punch spinach leaves which we already did so we have
little pieces ok         Boy: Second thing you do is put the leaves into the syringe
 
Girl: ok then you mix the baking soda
and water.        Boy: alright now you are going to mix it up a little bit I'm gonna just use this pencil
Girl: Okay that's good, next thing you do is
get the water and baking soda mixture into the syringe
Boy: you got to take the air - air out of the
leaves            Girl: okay so you get the air out of the leaves by
placing your finger over the top of the syringe
and pulling it as hard as you can and
while you're pulling it, you let go of the top and
there will be air in the syringe and
then you push the syringe back up and that takes the air out of the leaves
and now they start to sink (show them) so
that took the air out of the leaves and they sink.   Boy: alright.    Girl: okay next we need to    Boy: put the leaves back
into the mix of baking soda and water
and then we're going to take
this beaker filled with water and place it over the leaves
and we are going to put a lamp on it and
this will cause the leaves to      Boy: refill back up with air due
to photosynthesis     Girl: so the light will put air back into the leaves and start to float again
Boy: this could take up to an hour or 45 minutes
