27 Jun Photosynthesis & Respiration Hands-OnLabs,Inc. Lab Report Assistant
Question
Photosynthesis & Respiration
Hands-OnLabs,Inc.
Version 42-0102-00-01
Lab Report Assistant
Thisdocumentisnotmeanttobeasubstitute foraformallaboratoryreport.TheLabReport Assistantissimplyasummaryoftheexperiment’squestions,diagramsifneeded,anddatatables that shouldbeaddressedinaformallabreport. Theintentistofacilitatestudents’writing oflab reports by providing this informationin an editable filewhich can be sent to an instructor.
Observations
Data Table 1: PhotosyntheticRates
Rate
Distance (mm)
Solutionstarting measurement
Net photosynthesis
Respiration
Gross photosynthesis (net photosynthesis + respiration)
Rate of photosynthesis (gross photosynthesis / 10 min)
Bag mass g + 1.5 g NaHCO3 = Final mass (g)
Data Table 2: Respiration Results
Experimental
Conditions
Startingdistance
(mm)
Final distance
(mm)
Change in movement
(mm)
Time
(min)
WithElodea
WithoutElodea
Questions
Exercise 1:PhotosynthesisPartI
A. What molecules did the plant produce when exposed to light? B. What resources were consumed to produce the molecule?
C. What part did light play in the reaction?
D. What molecule was consumed by the plant while it was in the dark? E. What molecule was produced by the plant while it was in the dark? F. Where did the molecules go that were produced in the dark?
G. What criticalservice do plants provide humans?
H. Would animal life on Earth be possible without plants?
I. Would any life on Earth be possible without sunlight?
Exercise 2:PhotosynthesisPartII
A. When youblewthroughthestrawintotheBromothymolbluesolution,whatgasdidyouadd? What color change did you observe in the solutionand why?
B. Whatcolorchangeoccurredafteryouplacedtheplantintotherespirometerandturnedon the light?
C. What was happening when the solutionin the horizontal tubing started to move? D. How long did it take the color change to occur afterthe solutionstarted to move? E. Why did the color change?
F. Whenyourepeatedtheexperimentwithoutaplantintherespirometer,whathappenedand why?
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