Plant Experiment

1
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
Data for Plant A
8
Data for Plant B
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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
Controls

• We used the same amount of water on each plant.
• We used the same containers and same kind of dirt
  for all plants.
• We used the same kinds of seeds.
• All plants were placed in the south window.

12
Variables

• We used microwaved water for plant B and regular
  tap water for plant A.

13
Pictures of Experiment
14
Mean, Median and Range

• Plants watered with Tap Water
• Mean 18 16 18 52/3 17.5cm
• Median
• 16, 18, 18 18
• Range 18-16 2

• Plants watered with Microwaved water
• Mean 16 13 12 41/3 13.66
• Median
• 12, 13, 16 13
• Range 16-12 4

15
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 13.66 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.