Seed Experiment and CO2 Measurement

In this agricultural biology lab, students learn to set up an experiment to measure CO2 and O2 levels using a Spark Data Logger. The lab focuses on cellular respiration, examining how temperature affects respiration rates and CO2 production in dormant, room temperature, and cold-treated seeds. Students are guided through the materials needed, the experimental procedure, and data collection and analysis. The lab concludes with a discussion on the impact of temperature on respiration and CO2 production.

What are the two main gases being measured in this lab experiment?

• Carbon Dioxide and Oxygen

• Nitrogen and Oxygen

• Hydrogen and Methane

• Argon and Helium

Which device is used to collect data and perform lab write-ups in this experiment?

• Digital Thermometer

• Spark Data Logger

• pH Meter

• Gas Chromatograph

How many groups of seeds are used in the experiment?

• One

• Four

• Two

• Three

What is the first step in setting up the experiment with dry seeds?

• Measure the temperature

• Calibrate the oxygen sensor

• Count and place 10 seeds in a bottle

• Soak seeds in water

What is the purpose of calibrating the CO2 sensor?

• To measure humidity

• To ensure accurate CO2 readings

• To reset the data logger

• To adjust temperature settings

What is the main variable being tested with seeds soaked in room temperature water?

• Seed size

• Water pH

• Light exposure

• Temperature effect on respiration

What is the expected outcome when seeds are soaked in room temperature water?

• Increased oxygen production

• No change in CO2 production

• Decreased CO2 production

• Increased CO2 production

What is the final step after collecting data from seeds soaked in ice water?

• Repeat the experiment

• Store the seeds for future use

• Analyze the data and fill out charts

• Discard the seeds

Which page on the Data Logger is used for collecting data from seeds soaked in ice water?

• Page 15

• Page 10

• Page 18

• Page 13

What is the main question regarding CO2 production in this experiment?

• Does light affect CO2 production?

• Do dormant seeds produce more CO2?

• Is CO2 production affected by soil type?

• Does seed color influence CO2 production?