1. Johnny and Tommy Block 1 Sept. 18, 2008
Plant Experiment
Johnny and Tommy
Block 1
Sept. 18, 2008

2. Problem Identification
Do plants grow faster using microwaved water?

3. Hypothesis
We think that if you water a plant with microwaved water it will grow slower than a plant watered with regular water.

4. Materials Water Microwave 18 bean seeds 6 pots Dirt Graduated cylinder
Paper
Ruler
Writing utensil
Data tables
Tape or marker for labeling pots

5. Experiment Procedures
Label one pot A1, one A2 and one A3.
Label another pot B1, one B2 and the last one B3.
Fill each pot ¾ full of dirt.
Plant 3 bean seeds in each pot. Placing each one ½ inch into the soil.
Microwave 60 mL of water until it boils. Let cool.
Water the A plants with 20 mL of regular tap water every other day.
Water the B plants with 20 mL of microwaved tap water every other day.

6. Experiment procedures continued
Record in a data table the date experiment began.
Watch for germination. When the seed begins to grow record plant height daily.
Measure the seed that begins to grow first and ignore the other seeds in that pot.
Record data daily.

7. Height of plant in centimeters
Data for Plant A
Height of plant in centimeters
Day of experiment A1 A2 A3
Day 1
Day 6 1 .5 2
Day 7 3
3.5
Day 8 4
Day 9 6 7 8
Day 10 10
Day 13 14 16
Day 14 18

8. Height of plant in centimeters
Data for Plant B
Height of plant in centimeters
Date B1 B2 B3
Day 1
Day 8 1 2
Day 9 3
Day 10 4 6
Day 13 5 8
Day 14 10
Day 15 12
Day 16 16 13

9. Analyzing Data
Growth of Plant A
Height in Cm
Plant
Height in Cm

10. Analyzing Data
Growth of Plant B
Height in CM
Plant

11. Pictures of Experiment

12. Plants watered with Tap Water Plants watered with Microwaved water
Mean, Median and Range
Plants watered with Tap Water
Mean: = 52/3 = 17.5cm
Median:
16, 18, 18 = 18
Range: = 2
Plants watered with Microwaved water
Mean: = 41/3= 13.66
Median:
12, 13, 16 = 13
Range: = 4

13. Draw Conclusions
We found that the plant watered with microwaved water grew slower and less tall than the plants watered with tap water. The ones watered with tap water also germinated first.
Our conclusion is supported by the mean, median and range of our data.
We found the mean to be 17.5 for the plant grown in regular water and only for the microwaved water. This supports our hypothesis that regular water will grow larger plants.
The range between the plant A was smaller which shows that there was more even growth in those plants. The B plants grew at a much different rate and also took longer to germinate.
If we were to grow plants again or in a garden we would use regular tap water.