Water pollution

Introduction:

Last tuesday we make a new experience that consist in watch how grow the seed with contaminated water.

Procedure:

Take 10 ml. of the polluting solution and put them in a 100 ml tes-tube.

Fill it with distilled water up to 100 ml.

Pour this solution into a mew Erlenmeyer labeled ''polluting 0.1''.

Take 10 ml of the ''polluting 0.1'' solution and put them in a 100 ml test-tube.

Fill the test-tube with distilled water up to 100 ml.

Pour this solution into a new Erlenmeyer labeled ''polluting 0.01''.

Take 10 ml of the ''polluting 0.01'' solution and put them into a 100 ml test-tube.