Physics

Which things float and which sink? Guess first, then drop them in the water to check!

Did you know?

• Archimedes worked out the secret of floating while taking a bath. He shouted “Eureka!”, which means “I’ve found it!”.
• Steel ships float because their hulls are hollow and full of air.
• A bolt of lightning is several times hotter than the surface of the Sun!

Quiz

Why does a huge steel ship float on the sea?

• Because steel is lighter than water
• Because its hull is hollow and full of air
• Because it moves very fast