1. STATION 1 – London Bridge is Falling Down
Bridges are often built with gaps at intervals which look like this:
QUESTIONS:
What is the purpose of the gaps?
What might happen if there were no gaps in the bridge?

2. STATION 2 – Warning, Warm Wires
QUESTION:
Why might it be a bad idea for the National Grid to put up new electricity wires on a warm day?

3. STATION 3 – Pop in the Shop
When you buy a bottle of water or fizzy drink in the shop you will notice that it is not filled to the top.
QUESTIONS:
Why are bottles not filled to the brim?
What might happen if bottles were filled to the top?