Establish a better understanding of photosynthesis and cellular respiration, and apply the scientific method to solve (or understand) a problem. Photosynthesis and respiration are reactions that complement each other in the environment. They are essentially the same reactions, but they occur in reverse. During photosynthesis, carbon dioxide and water yield glucose and oxygen. Through the respiration process, glucose and oxygen yield carbon dioxide and water. They work well together because living organisms supply plants with carbon dioxide, which undergoes photosynthesis and produces glucose, and these plants and bacteria give out oxygen, which all living organisms need for respiration.

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?

• 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 Average O watts 25 watts 50 watts 100 watts