Unit 41: Cells and Basic Biochemistry

Day 27 of 30

Comparing respiration and photosynthesis

6-8Science

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Learning Objective

Students will compare respiration and photosynthesis through guided practice and application.

Today's Lesson

In this lesson, we'll explore comparing respiration and photosynthesis. Scientific inquiry allows us to investigate and explain natural phenomena.

Photosynthesis is the process plants use to make their own food using sunlight, water, and carbon dioxide. Inside plant cells, chlorophyll (which makes plants green) captures sunlight. The plant uses this energy to turn water (from roots) and carbon dioxide (from air) into glucose (sugar for food) and oxygen. The equation is: sunlight + water + carbon dioxide → glucose + oxygen. Plants feed themselves and produce the oxygen we breathe—thank you, plants!

As you work through today's material, pay attention to the examples and try to identify the patterns or strategies being used. This will help you apply these concepts to new problems.

Take notes on key points and make connections to what you've already learned in previous lessons.

Key Terms
Photosynthesis

The process of converting light into chemical energy

Investigate

To examine systematically through observation and experiment

Activities
Instructions
1. Read the background information on comparing respiration and photosynthesis. 2. Form a hypothesis before beginning. 3. Conduct the investigation following procedures. 4. Record observations and analyze results.
Materials Needed
  • Lab notebook
  • Investigation materials
  • Safety equipment if needed
Practice Problems
1

What three things do plants need for photosynthesis?

Hint: Think about sunlight, air, and water.
2

What do plants produce during photosynthesis?

Hint: One is food for the plant, the other is what we breathe.
3

Where in the plant does photosynthesis take place?

Hint: It happens in the green parts.

Teaching Tip

For advanced learners: Encourage deeper analysis and real-world connections. Consider extension activities that allow students to apply comparing respiration and photosynthesis to novel situations.

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