PIMSO 2022 - Science - Grade 2 - National Round Question 10

When you want to pop a balloon at a party, you may sit on it. The volume of air inside the balloon decreases just before it explodes. This is because air is a gas that can change their volume. This illustrates what property of gasses?



Image: Pipirafa, own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=74475513