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Learn to plant and maintain strong, healthy trees that will thrive for generations.

Photosynthesis

Learning Objectives:

Students will be able to

  • Understand that plants use light energy to create food energy
  • Describe the inputs and products of photosynthesis.

Time: 45 minutes

Materials:

For each student:

For the class:

  • Aluminum foil
  • plastic bag and a straw
  • young bean seedlings

Procedure:

Distribute, read and discuss Photosynthesis and Food Chains.

Set up one or more of these photosynthesis investigations:

1. Cover a leaf with aluminum foil. Remove the foil after several days. What’s happened? Why? (The leaf, unable to photosynthesize, will turn yellow and eventually die.)

2. Grow two bean seedlings. Put one in a cupboard and leave the other in the sun. Compare the seedlings after a few days.

3. Cover a branch of a plant with a plastic bag. Close the bag, use a straw to get the air out and seal the bag with tape. Observe the branch for several days. What is happening to the bag? (It should expand as the plant produces oxygen.)

Students record observations about these investigations in their journals. Add findings to the class chart.