The jar should be covered so that it is saturated with the vapours of the volatile solvent before the plate is allowed to run.

Fire requires oxygen to burn. No oxygen = no flame. When you put a flame in a jar it lives off the oxygen inside the jar for a while. Once you put a lid on the jar, eventually the jar will run out of oxygen and the flame will burn out.

it'll make it fly up

it will grow mucor

The independent variable is how each jar is covered.

The dependent variable is the amount of maggots in each jar.

The control groups are Jar1( no covering, left open), and Jar 2 (covered with netting).

The experimental group is Jar 3 Sealed from the outside).