Page 18 - SK Year 5 Science DLP

5. Apparatus and materials
Safety goggles, measuring cylinder, stopwatch, plastic
container with a lid, drinking straw, tablespoon, water,
dishwashing liquid, and glycerine.

6. Steps
(a) Conduct this experiment at a less windy area.
(b) Wear safety goggles to protect your eyes.

(c) Prepare a soap solution using (d) Add one tablespoon of
200 ml of water and 50 ml glycerine into the soap
of dishwashing liquid. Then, solution. Stir well without
stir the solution well without producing any bubbles.
producing any bubbles.

(e) Then, leave the solution (f) Dip a drinking straw into the
for four hours at room solution and place the end of
temperature. the straw on the plastic lid.

TEACHER'S Glycerine is used to make the bubbles last longer.
10 NOTE It can be bought at baking supply stores or pharmacies.
10