Create pollution catchers to observe and compare the air in different locations.
To make the pollution catchers:
Take 4 index cards and create a hanging loop out of string and tape for each one. Smear the unlined side of each index card with a thin layer of petroleum jelly. Hang 3 of the cards in various locations. Put the 4th inside a plastic zip-top bag as a control. After 2 days, put each index card into a zip-top bag and compare what is on them using a magnifying glass.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment