Day: January 9, 2017

We tested the strength of five plastic bags in our Science lesson this afternoon.

Our experiment was a fair test because we only changed one variable each time.  Do you remember which variable was changed?

It was interesting to discover that three bags were extremely strong. Which bags were the strongest?

Can you test the strength of other plastic bags at home? Make sure that an adult helps as the bags get very heavy.

Plastics
Plastics are materials made from chemicals and are not found in nature. They are strong and waterproof, and can be made into any shape by applying heat. Plastics can also be dyed different colours or made to be transparent. Plastics are used to make all sorts of things, such as bags, bottles and toys.

Have a look at the BBC Bitesize website to find out more about plastics and other materials.

http://www.bbc.co.uk/bitesize/ks2/science/materials/material_properties/read/4/