Flask and test tube. Home button There is a single light of science, and to brighten it anywhere is to brighten it everywhere. - Isaac Asimov
Experiments Button Research Center Button Media and resources button About button
Experiments
Summary of Results
Does cooled microwaved water kill plants?
Cartoon plant resisting being watered.
Top of page

This page is a brief summary of the experiment. If you would like a thorough description of our study see the detailed experiment page.

Contents of this page:

Problem:

Does watering a plant with water that has been microwaved kill the plant within 9 days?

Top of page

Hypothesis:

Microwaved water will:

  • kill the plants - 1 student vote
  • harm the plants - 4 student votes
  • not affect the plants - 14 student votes
  • help the plants - 3 student votes
Top of page

Experiment design:

Outline:

  • Subject: Little Hero Yellow Marigold, Tagetes patula.
  • Sample size: 48 (24 experiment, 24 control) plants.
  • Water: Bottle drinking water.
  • Duration: 10 days (original experiment claimed experiment plant died in 9 days).
  • Double blind studyPop-up glossary definition.; we did not know which group, A or B, received the microwaved water.
Top of page

Observations and data:

Only 6 sets of Day 1 and Day 10 pictures are presented here. The samples below were picked before the results of the experiment were known.

To see all 24 paired sets go to the detailed observations page. If you're really data hungry use the plant gallery where 24 sets of 8 pictures can be found.

Plant A is always to the left.

Pair 1, Day 1
Pair 1, Day 10
Pair 1, Day 1
Pair 1, Day 10
Pair 8, Day 1
Pair 8, Day 10
Pair 8, Day 10
Pair 8, Day 1
Pair 10, Day 1
Pair 10, Day 10
Pair 10, Day 1
Pair 10, Day 10
Pair 17, Day 1
Pair 17, Day 10
Pair 17, Day 10
Pair 17, Day 1
Pair 21, Day 1
Pair 21, Day 10
Pair 21, Day 1
Pair 21, Day 10
Pair 24, Day 1
Pair 24, Day 10
Pair 24, Day 1
Pair 24, Day 10
Top of page

Conclusion:

The class concluded that the microwaved water had no influence on the plants, because all of the plants (except the 3 that died due to lack of water over the weekend) were growing equally well. We could see no differences in health between the A and B plants.

The container containing the microwaved water was in jug A.

End of article - Top of page