Witness the biggest seasonal
change on Earth!
During the winter months, Antarctica’s surrounding
waters freeze over. A salty kind of ice known as sea-ice
stretches out over the surface, making the continent
that much bigger.
Can you work out approximately how much bigger?
March (summer)
September (winter)
 Each grid square represents one million square
kilometres.
 Count up all the whole squares and add together
bits of squares to make whole ones.
Seasonal change 1
 Approximately how much bigger is Antarctica in
September compared to March?
 What’s the coldest weather you’ve ever
experienced?
 What did it feel like?
 How did you keep warm?
Seasonal change 2