Clouds weigh several tons but stay airy by distributing their weight over a large area.
We’ll give you three things that are related in some way, and it’s your job to come up with how they are related. Ready? The three things are: poisoned fish, industrial pollution, and a contaminated lake. How do these puzzle pieces fit together? Learn more on this Moment of Science.
Impress your friends with a cool candle trick: learn how to blow on a candle flame and make it come toward you rather than lean away or even go out.
But a hot air balloon doesn’t have any way of pushing itself forward. It can only go up or down. So how can it move around?