Lab Write-Ups

Lab Write-Up for Lab 5: Due Fri 10/25/2011. Must be typed (single space/10-12 pt font, 1 inch margins, can be double sided or on recycled paper). If (and only if) your printer breaks, you may email it to me.

Title: … Oxygen… cellular respiration… ___ peas vs. ____ peas.

Lab Partners:

Introduction/Purpose: State the purpose (what you’re trying test/experiment on). (1-3 sentences).

Hypothesis: (two…)

Background: Cellular Respiration (Oxygen vs. CO2… Germination… KOH…

Procedure: Summarize what you did (the major steps). (paragraph form – not bullets/list)

Tables/Graphs: Your group’s data.

Graph:Two graphs (cumulative corrected differences for group data) with2 lines (Germinating & dry at ~22°). x-axis (independent) = time (min), y-axis (dependent) = amount of O2 used (mL). AND… a graph for germ and dry at 10°

Calculation: Calculate Rate of O2 consumption per minute at different time intervals. (0-5min, 5-10min, 10-15 min, 15-20 min). Do this in a table if you like. : Show formula and at least one calculation.

Results (-2)

• Write a sentence or two stating whether or not the results from the lab procedure fully support your hypothesis, do not support the hypothesis, or support the hypothesis but with certain exceptions.
• In a paragraph, identify specific data from your lab that led you to either support or reject your hypothesis. Refer to the visual representations of your data as evidence to back up your judgment about the hypothesis.

Discussion (Total=9)

In a paragraph, use your understanding of the scientific concept of this lab to explain why the results did or did not support your hypothesis. If the hypothesis from the Introduction was not fully supported, show how your understanding of the scientific concept has changed. Note any citations you use here for including in the Reference section of your report.

Discuss other items as appropriate, such as (1) any problems that occurred or sources of uncertainty in your lab procedure that may account for any unexpected results; (2) how your findings compare to the findings of other students in the lab and an explanation for any differences; (3) suggestions for improving the lab.

Conclusion (1 points)

A ONE sentence testable statement that combines purpose and results.

Extension: Design your own experiment, testing something about rate of oxygen consumption as a result of respiration. Think of a new variable (maybe ….). Come up with a hypothesis (expected results). Develop a basic procedure.