This week for homeschool we are learning all about weather! From hurricanes and tornadoes to rainbows and a cloud in a jar, we are covering it all.
After a little thunder and lightening last week, Izzy decided that we needed to know everything there was to know about weather. Not going to lie, secretly stoked to bring out all of my weather nerd facts.. pretty sure this is why I have no friends.
So clouds, those big, fluffy, sometimes angry looking things in the sky. Whether they hide the sun or bring rain, they’re pretty cool. A thing called Precipitation is the name for the process that makes a cloud. Depending on the height of a cloud and how cold the air around it is, a cloud can be made up of tiny drops of water or ice crystals.
Warm, wet air rises and as it cools down, it turns into water vapour and condenses out, but it does need something else to help the process such as things produced by mother nature- dust particles, pollen, ice, sea salt, volcanic ash or even something not naturally produced such as air pollution. These are called aerosols. They all then stick together which forms a cloud.
You’re probably thinking, how the fuck are we going to get a cloud in a jar then? Well, we are doing something similar but on a smaller scale. When you add your warm water to the jar, some of it turns to water vapour (changes to drops of water). The water vapour rises to the top of the jar which comes into contact with the cold air made by the ice cubes on top of the lid.
Water vapour changes to millions (hundreds on our scale) of little droplets of water as it cools. Because we don’t have dust particles, ice, pollen or sea salt to help form our cloud, we are using hair spray instead which acts as the aerosol to bind everything together.
– ice cubes
– a jar with a screw top lid
– hair spray
– hot water
What to do
– Grab your jar and pour 1/3 of a cup of hot water in. Swirl it around and pop the lid on UPSIDE down.
– Pop a handful of ice cubes on top of the lid and let it sit for about 20-25 seconds.
– Take the lid off and quickly spray in some hairspray. Put the lid back on, ice cubes and all.
– When a decent amount of condensation has formed, take the lid off and watch your cloud escape!