For this experiment, we need 5 things.
So let’s go!
Question: So, Why did the liquids mix when the hot water was at the bottom ?
This happened because hot water always wants to stay at the top so it rises up.
But wait a minute, Why does hot water rise ? Hot water rises when we heat it.
When we heat it, its tiny little particles also known as molecules begin spreading away And as they spread away they take up more space.
So, a volume of hot water weighs a little bit less than the same volume of cold water. Therefore, hot water is less dense than cold water.
Now you may ask hot water and cold water are just the same thing then why do they have different densities?
Remember friends a same substance can have different densities at different temperatures.
In fact our liquids mix and move together because they have different temperatures.
This up and down movement within any liquid or gas where the hot one goes up and the cool one comes down is called CONVECTION. Have you ever wondered why are smoke detectors always placed at the top?
Yes, you guessed it right. It’s because smoke is hot and hot air rises up From spring, summer, autumn to winter all these different seasons are due to convection. And Thanks to Convection, you and I can enjoy a steamy bowl of rice.
So, friends now that you know what convection is, let’s see how many examples can you gather on your own. Toodles!