Students continue their study of plants by designing and conducting experiments involving plants. They examine stomata and observe the way they function. They test plant growth in different colors of light to learn what parts of sunlight are used during photosynthesis. They observe transpiration and learn what gases enter and exit plants. Finally, students test the effect of environmental factors on the germination rate of seeds.

Student Resources

• 4.1 Vocabulary
• 4.2 Photosynthesis and Cellular Respiration
• 4.3 Observing Stomata
• 4.4 Colored Light and Plant Growth
• 4.5 Writing a Lab Report
• 4.6 Where Do Gases Enter and Exit a Plant?
• 4.7 Section 4 Assessment

Learn by Reading

For additional content-area reading, check out the Houghton Mifflin Science eBook: Grade 5, Unit A, pages 50–54 and 62–64.