Viscosity Races

By Caitlin & Shams

Aim:

To test the rate at which different fluids flow.

hypotheses

the water is going to slide down the gradient the fastest and the yougert is going to be the slowest.

Materials needed:

A stop watch



A tape measure



A ramp – a table and two tote trays (secured with masking tape)



30mls of each different liquid to test (water, oil, tomato sauce, honey and mayonnaise)



Small containers



Pencils



Recording tables/sheets



A plastic drop of cloth to catch the mess



Calculators

Method:

1 measure out 30mls of each liquid



2 set your stop watch to zero



3 tip one liquid at a time from the top of the ramp. Remember to communicate with your group to ensure the timer starts as you tip the liquid.

4 let the liquid flow for the set time you have decided and measure the distance travelled.



5 record your results in the table



6 repeat for each type of liquid, recording your results as you go



7 clean your ramp for the next test



8 tip one liquid down the ramp and time how long it takes to reach the bottom



9 record your results in the table.



10 repeat for each type of liquid, recording your results as you go



11 record each group’s results as they become available.



12 using the calculator, determine the mean distance and speed for each liquid