1. Remove the top from
the clear plastic bottle (keep the
2. Pour out ½
cup vinegar into the measuring cup.
3. Add a couple
of drops of the blue food colouring
into the vinegar.
4. Place the funnel
in the mouth of the bottle and pour
the vinegar mixture into the bottle
(holding the funnel and bottle with
one hand and pouring the vinegar in
with the other hand).
5. Swivel the bottle
around a bit so that the blue food
colouring mixes with the vinegar.
6. Pour out ½
cup oil into the measuring cup.
7. Place the funnel
into the mouth of the bottle and pour
the oil into the bottle (again, holding
the funnel and bottle with one hand
and pouring the oil in with the other
8. Remove the funnel
and screw the lid back onto the bottle
(making sure that the lid is secured
properly so that there is no leaking).
9. Shake the mixture
and see what happens (the vinegar
and oil mix together). Keep watching
the mixture for a few minutes (the
oil and vinegar will separate).
10. Take the lid
off and tip the bottle to pour out
a bit of the mixture into the sink.
What happens? The oil comes out and
the vinegar stays to the bottom of
11. Place your index
finger (pointer) over the top of the
bottle and turn it upside down over
the sink very slowly, keeping your
finger in place.
12. Now uncover
a bit of the opening of the lid and
let a little bit of the solution drip
out. What comes out this time? This
time the vinegar drips out.
you noticed that the oil stayed on
top of the vinegar in both experiments?