Activity 39: Cells Alive – Cellular RespirationRecord the following experiment in your Science notebook.

Activity 39 Background Knowledge

Add to Important Vocabulary

Cellular Respiration:The process that cells use tobreak food down into ATP or energy.

Question

Do cells yeast cells releaseproduce carbon dioxide through cellular respiration?

ResearchComplete the following sentences in your notebook:• Yeast is…• Cells take in oxygen and release _____________• When carbon dioxide is present, BTB will __________________________________________________

HypothesisWrite a hypothesis for the question we are investigating.Be sure to include:• I think…• Because…

Procedure (copy into your notebook)25 drops yeast 25 drops yeast

10 scoops sugar

50 drops water2 drops BTB

25 drops water1 drop BTB

Understand the experiment1. What is the manipulated

variable in this experiment?2. How will you know if the yeast cells are doing cellular respiration? (Name 2 indicators)3. Based on what you know about cellular respiration,how would you expect cup 2 and cup 3 to be different?4. What is cup 8 for?

Data Table

Initial ObservationsThis is what our experiment looked like when it was firstset up. Make observations and record them in your “initial observations column.

Final Observations:

This is what our experiment looked like after 2 hours. Make observations and record them in your “final observations”column.

Conclusion

Answer the original question in your notebook BASED ON THEEVIDENCE YOU COLLECTED. You must support each claim you make with evidence from this experiment or research.

SLE #8: I can use evidence to develop descriptions, explanations,and predictions.