photosynthesis & respiration lab what is the relationship between photosynthesis and...
TRANSCRIPT
![Page 1: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/1.jpg)
Photosynthesis & Respiration Lab
What is the relationship between photosynthesis and respiration?
![Page 2: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/2.jpg)
Part 1
Investigative Question: What will happen to a carbon dioxide solution of CO2 and water if a water plant is added?
Write your hypothesis:
“If _______________ then__________ because__________________________.”
*Get signed off by your teacher
![Page 3: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/3.jpg)
MaterialsTest tubes x 4
Stoppers x4
Elodea (2cm) Foil
Test tube rack
Bromothymol BlueLamp
![Page 4: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/4.jpg)
The Acid-Base Scale & Bromthymol Blue
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Most least least most
Acidic Neutral Basic
6 7 8
Water
CO2 in water
No CO2 in water,
Regular tap water
Distilled water
![Page 5: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/5.jpg)
Protocol
1. Label your test tubes with your names and the letters A, B, C, and D.
2. Fill each 1/2 full with distilled water.3. Add 1 dropper of acid/base indicator
(bromothymol blue)
A B C DPer5 Per5 Per5 Per5
Name Name Name Name
![Page 6: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/6.jpg)
4. Place a straw into Test Tube A.
5. Gently blow into the solution until it starts to turn yellow- STOP IMMEDIATELY when you see a change in color!!!
STOP!
A
A
![Page 7: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/7.jpg)
6. Repeat Steps 4 & 5 for all test tubes& place 1 sprig of elodea into test tubes A & C.
A B C DPer5 Per5 Per5 Per5
Name Name Name Name
![Page 8: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/8.jpg)
7. Then place stoppers on all test tubes.
A B C DPer5 Per5 Per5 Per5
Name Name Name Name
![Page 9: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/9.jpg)
8. Wrap Test Tubes C & D with foil so that no light can get in.
A B C DPer5 Per5 Per5 Per5
Name Name Name Name
![Page 10: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/10.jpg)
9. Place all test tubes on a test tube rack or holder and place in the tray that will go under a light.
A B C DPer5 Per5 Per5 Per5
Name Name Name Name
![Page 11: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/11.jpg)
Predictions:
Test Tube
Color after 24 hours
pH = ? Why do you think this?
A
B
C
D
![Page 12: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/12.jpg)
Original Data Table
Test
Tube
Color start
(pH = 6-, 7, 8+)
Color after 24 hours
(pH = 6-, 7, 8+)
A
B
C
D
![Page 13: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/13.jpg)
Class Results: Color (pH) changes for Day 1
Group Tube A Tube B Tube C Tube D
1
2
3
4
5
6
7
Mode:
![Page 14: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/14.jpg)
Part 1- Data Collection
1. Observe the results after 24-48 hrs.
2. Record data on data table.
![Page 15: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/15.jpg)
Part 2
Investigative question: What is the role of light in photosynthesis? What might happen if the tinfoil was switched to test tubes A & B?
Write your hypothesis:
“If _______________ then__________ because__________________________.”
*Get signed off by your teacher
![Page 16: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/16.jpg)
Identify the following in this inquiry:
• The manipulated variable _____________• Responding variable_________________• Controlled variables _________________
____________________
• Experimental control _________________• Purpose of the experimental control _____
__________________________________
*Get teacher signature
![Page 17: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/17.jpg)
10. Wrap Test Tubes A & B with the foil so that no light can get in.
C D A BPer5 Per5 Per5 Per5
Name Name Name Name
![Page 18: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/18.jpg)
11. Place all test tubes on a test tube rack or holder and place in the tray that will go into the greenhouse.
C D A BPer5 Per5 Per5 Per5
Name Name Name Name
![Page 19: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/19.jpg)
Part 2 Data Table: pH after light/dark conditions reversed
Test Tube
Color after 24-48 hours
pH = ? Why?
A
B
C
D
![Page 20: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/20.jpg)
Part 2 – Data Collection
• Record your results in your data table.
![Page 21: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/21.jpg)
Analysis Questions Part 1:
1. Explain what happened to the pH of the solution for Test tube A. Why did you get these results?
2. How were these results different than test tube B? Why?
3. How were they different than C? Why?
4. And D? Why?
![Page 22: Photosynthesis & Respiration Lab What is the relationship between photosynthesis and respiration?](https://reader033.vdocuments.site/reader033/viewer/2022061617/55155af255034685568b58c0/html5/thumbnails/22.jpg)
Analysis Questions Part 2 & 3:
1. What results changed as a result of switching the foil on the test tubes?
2. Why do you think this happened?
3. What is the role of light in photosynthesis?
4. Can plants do respiration? What evidence supports this?
5. What changes would you make to improve this lab and why?