1. How Much Water Does a Plant Lose?
Grade 7 Experiment
How Much Water Does a Plant Lose?

2. Treatment: Fan ONLY (Windy Day)
Table #1: Raw Data
Group #
Treatment: Fan ONLY (Windy Day)
Leaf A (Control)
Leaf B (Experimental)
Start Mass /g
Final mass /g
Final Mass /g 1
0.260
0.252
0.312
0.309 2
0.242
0.238
0.316
0.304 3
0.538
0.529
0.446
0.431
Treatment: Hair Dryer (Hot, Windy Day) 4
0.520
0.435
0.500
0.171 5
0.592
0.486
0.534
0.321

3. Table #2: Processed Data
Treatment = fan (Windy day)
Leaf A (Control)
Change in Mass /g
% change in mass
Av. Change in mass /%
- 3.0
-0.003
- 1.0
- 2.5
- 3.8
- 1.7
-2.4
-0.015
- 3.4
-2.7
Treatment = Hair dryer (Hot, windy day)
Change in Mass /g
% change in mass
Av. /% Change in mass
- 8.7
- 66%
- 8.1
- 8.4
- 40%
- 53.0