Air is one of the elements of nature. Children have experienced air, but do they really know about it?
Let us learn some facts about air
- Air is a mixture of multiple gases.
- Animals and people require the oxygen that is found in the air to breathe.
- Small particles that have been trapped in the air for a while are called aerosols. For instance, aerosols include dust and vehicle pollutants.
- Air has weight. At sea level, it is the heaviest. The pressure of the air above it causes the gas particles to gather together there. Away from the surface of the Earth, air becomes lighter.
- Air is invisible to human sight, although in hot air it can be seen as a gleaming light.
Students can see pollution in the air with the help of this activity, which is a fantastic teaching or memory help while addressing the subject. And it’s incredibly simple! In conclusion, students gather water and air samples, put them in transparent glass or plastic jars, and then manually “pollute” them.
What will you need?
- Eight jars
- Plastic wrappers or small pieces of plastic waste
But here are some quick ideas for what you may put in your jars to contaminate them: You might drop a lit match into your jar of air and rapidly secure the top so that the smoke is contained in the jar. That will definitely impart a dark or grey tint to the otherwise pure air! Dirt and plastic scraps will do for the water jar. To allow children to compare clean and contaminated samples, keep jars of clean water, air, and snow on hand.
The concept of the differences between contaminated and unpolluted habitats might be usefully introduced to children through this activity.
Once finished, the jars can be used as props for other pollution-related environmental activities and assemblies as well as a handy reminder