Rain in a Bag

This term's Big Idea is 'Water of Life'. 

We are looking at this idea through a science focus.

One of our first experiments was to set up a 
mini water cycle in a bag.

We put the bags on the window where the sun will (hopefully) shine on them.

If you look closely, you might see droplets of water on the inside of the bags.

This is called condensation.

How did the droplets of water get onto the sides of the bags?

Why are the droplets of water not blue like the water at the bottom of the bags?