Do an experiment : How clean is your Air?

Do an experiment : How clean is your Air?

It can be pretty hard to tell what is floating around in the air because most airborne particles are too small for the naked eye to see. Here is an easy way to collect and observe some of the larger particles in your air. How clean is your air?

How Clean Is Your Air?

You will need:
• 4 white paper plates
• petroleum jelly
• duct tape
• 4 wooden blocks/bricks
• camera

1. Find four locations you would like to test including an indoor and an outdoor location.
List the locations in the table below.
2. Create four sensors. Use the duct tape to securely attach a paper plate to a block/
brick. Then coat the top of the paper plate with petroleum jelly.
3. Place a sensor in each of the four locations.
4. Take photos of the plates and their locations.
5. Let these particle sensors sit for at least 24 hours. Make sure you test a time period
during which there is no rain or snow.
6. After 24 hours, take photos of the plates and compare them with the pictures from step 4.
Rank the locations from cleanest (1) to dirtiest (4) in the table.


1. Can you see any particles in the petroleum jelly?
2. Do the outdoor sensors have less or more particles than the indoor sensors?
3. What location had the cleanest air?


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