Materials

1) Four similar small-sized pots of the same species of plant

 ·         Volume of one pot: 300cm³

 ·         Height of one pot: 12cm

Pot A

Pot B

Pot C

Pot D



2) 25ml of tap water given to each pot per day (Total volume of tap water given to plants per day: 100ml for four pots)

 
3) One container filled with 25ml of water to water each pot of plant

4) One transparent tank with no holes (volume of tank: 20cmx13cmx13cm = 3380cm³) to cover each pot of plant when the plant is exposed to smoke

5) One lighted 7-cm wax candle needed per day to burn the papers

6) One small dish (to place the burning paper)

7) Six pieces of rough paper per day (Total number of paper used for experiment: forty-two of paper)

8) 800cm³ of soil (200cm³ of soil per pot of plant)