Explain photosynthesis and cellular respiration

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Explain photosynthesis and cellular respiration

Title: Understanding the Scientific Method: Photosynthesis and Cellular Respiration

Instructions: Based on the virtual experiment, you will answer some questions and write a 1-page lab report using the scientific method.

Using what you learned on the lab animation, answer the following questions:

• Define a hypothesis that is suggested by the data that are collected in the lab.
• Complete a lab report using the scientific method.
• What effect does the intensity of light have on the rate of photosynthesis (measured as the number of oxygen bubbles)?
• Is it possible to examine the relationship between photosynthesis and cellular respiration under controlled experimental conditions? Explain your answer in detail.

Part 1: Using the lab animation, fill in the following data tables to help you generate your hypothesis, outcomes, and analysis:

Table 1: Rate of Photosynthesis Measured by the Number of Oxygen Bubbles

Light Bulb

Trial 1

Trial 2

Trial 3


0 watts





25 watts





50 watts





100 watts





Part 2: Write a 1-page lab report using the following sections of the scientific method:

• Purpose

o State the purpose of the lab.

• Introduction

o This is an investigation of what is currently known about the question that is being asked. Use background information from credible references to write a short summary about the concepts in the lab. List and cite references in APA style.

• Hypothesis or Predicted Outcome

o A hypothesis is an educated guess. Based on what you have learned and written about in the introduction, state what you expect to be the results of the lab procedures.

• Methods

o Summarize the procedures that you used in the lab. The methods section should also state clearly how data (numbers) were collected during the lab; this will be reported in the results or outcome section.

• Results or Outcome
o In this section, provide any results or data that were generated while doing the lab procedure.

• Discussion and Analysis

o In this section, state clearly whether you obtained the expected results and if the outcome was as expected.

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