One of the topics our class have been focusing on for science week is viscosity.

We learnt that the viscosity of a liquid is how thick or thin it is. If a liquid has high viscosity, it is very thick and moves very slow when you pour it out, but if a liquid has low viscosity it is very thin and runs quickly when you pour it.

Each of us brought in a different liquid and we made a viscosity chain using our knowledge, putting the thickest liquids first and the thinnest ones last. It was sometimes quite  challenging to work out a liquids place in the chain.

For example, a lot of people brought in different types of oil and it was hard to try and work out the viscosity of each one.

We also learnt about non Newtonian and Newtonian liquids. Non Newtonian liquids do not change when force is applied but Newtonian liquids  do change like tomato ketchup when you shake it, paint when you stir it and toothpaste when you mix it.

One good example is cream, when you whisk it, it changes consistency and becomes really thick and no longer takes the shape of its container. It behaves more like a solid.