Viscosity and chocolate!
Learn what the term "viscosity" means and how scientists measure it
+Test various liquids for viscosity, including chocolate!
+ Develop understanding of fair testing an experimental design
+ The older groups will also evaluate different viscosity measurement methods
5-9s groups: 1 - 1:50pm (UK GMT): 30th / 31st March
10-15s groups: 2:10 - 3pm (UK GMT): 30th / 31st March
(Select from the options below).
Equipment (To join an entirely optional practical)
It is a good idea to have a whiteboard or paper, pen, ruler and calculator to hand in each session.
- Approx. 50g molten chocolate in a cup (they'll need this melted and ready to use at the beginning of the session) take care with hot liquids. (if you don't want to use chocolate, a flour and water paste would also work)
- 5 teaspoons
- 6 rectangular biscuits or pieces of card
- Two plates
- Four or five Boiling tubes / tall narrow glasses / jars (the narrower they are the less liquid you'll need)
- Enough of each of these to fill at least 10cm depth of your tubes or jars
-water (take care near electronics)
-Liquid soap / shampoo
-Vegetable or other oil
-To extend the experiment: One or more other liquids (such as tomato ketchup, passata, sauce, fruit juice)
- Five or more small heavy balls of equal size, they need to fit in your tubes: Marbles (standard / small size) are ideal. Small bolts, ball-bearings, nuts, drawing pins or 5p pieces would also do.
- Stop watch / timer
- A lightweight chopping board
- Two tins of food (full) or a pile of books
- Blue tack / similar
- Pipettes / spatulas / syringes may be helpful
- Pen / pencil and paper / whiteboard and pen
- You might want cloths and hand washing wipes to hand!
Links offer suggested sources of suitable materials.
What might younger students need help with?
This could be a little messy! Younger students may need help with cleaning as they go and not touching computers with stick hands!
They may need chocolate to be melted or kept warm and molten until the need it (should be fairly early in the session).
Price is for one student for one session.
Upon booking you will receive a photography consent form and opportunity to let us know about any Special Educational Needs and Disabilities (SEND).
By booking you are agreeing to read and abide by the privacy, safety and cancellation policies. (Opens in a separate window).