When you blow up a balloon, it gets bigger and bigger. This is like expansion! The balloon is expanding because you’re putting more air inside, making it grow larger. Expansion means something is getting bigger or taking up more space.
Think about a sponge in water. When it’s dry, it’s small and squishy. But when you put it in water, it soaks up the water and gets bigger. The sponge is expanding because it’s filling up with water.
Imagine a flower growing in your garden. It starts as a tiny seed and with water, sunlight, and time, it grows into a big, beautiful flower. This is expansion too! The flower is expanding as it grows.
Picture a popcorn kernel. When you heat it up, it pops and turns into a fluffy piece of popcorn. That’s expansion happening quickly! The heat makes the kernel expand and change shape.
Finally, think about playdough. When you roll it out, it spreads and gets bigger. You’re expanding the playdough by stretching it out. Expansion can happen in lots of different ways!