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Topics  > Biology > Botany

Comparison of growth rates of plants in and out of greenhousesFeatured science projectScience project video


  1. Which plant grew the fastest?
  2. Why do you think so?
  3. Should we all use greenhouses for growing our plants? Why or why not?

Questions & Answers

Name three things that greenhouses protect against.

Can you think of a reason why we would not want to use a greenhouse?

Make it Your Own

Use a thermometer to determine the temperature inside the greenhouse and the ambient temperature of the free-standing plant. Add another free-standing plant that is surrounded by bags of ice or a cold-pack. See which plant grows fastest.

Relate the greenhouse to global warming by observing the amount of water vapor trapped inside the structure. Talk about how the greenhouse gases get trapped in our atmosphere by water vapor.

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    Complexity level:
    Project cost ($):
    Time required:
    About an hour to set up, observations every 2 days and a wrap-up at the end of the growth period.
    Material availability:
    Safety concerns: