Activity 39: Cells Alive –
Cellular Respiration
Record the following experiment in your Science
notebook.
Activity 39 Background
Knowledge
Add to Important Vocabulary
Cellular Respiration:
The process that cells use to
break food down into ATP or
energy.
Question
Do cells yeast cells release
produce carbon dioxide
through cellular respiration?
Research
Complete the following sentences in your notebook:
• Yeast is…
• Cells take in oxygen and release _____________
• When carbon dioxide is present, BTB will _______
___________________________________________
Hypothesis
Write 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
2 drops B
25 drops
1 drop BT
Understand the experiment
1. 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 Observations
This is what our experiment looked like when it was first
set 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 THE
EVIDENCE 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.