Photosynthesis and Respiration



  • The “Effects of a Closed Environment on Living Things” lab demonstrates how plants use carbon dioxide and produce carbon and how animals use oxygen and produce carbon dioxide.
  • This “Do Plants Consume or Release CO2? Or Both?” lab demonstrates how plants carry on both photosynthesis and respiration.
  • The “Rate of Photosynthesis” lab explores just that.
  • Do the “Leaf Pigment Chromatography” lab (doc).
  • This lab (doc) compares the production of starch in leaves kept in the light and those in the dark.
  • This “Fermentation by Yeast” lab (doc) can be used in this unit or with the study of microorganisms.
  • Photosynthesis: A Controlled Experiment” illustrates the effect of differing amounts of carbon dioxide on photosynthesis in geranium plants. Coleus or other similar plants could just as easily be used.
  • In “The Heat is On – The Energy Stored in Food” students will burn several types of nuts and snack foods in order to determine their heat content per gram.
  • In Kim Rebello’s “Every Breath You Take” (doc) lab students investigate whether animals and plants carry on respiration.
  • This “Plant Respiration” lab (doc) uses seedlings and a bromothymol blue solution to demonstrate that plants give off CO2 during respiration.


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