Halobacteria Experiment Grader

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HalobacteriaExperimentGrader
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Title (1 point)Does the Experiment start with
a title that appropriately describes what the
experiment is about?(Does it include the
manipulated variable and the responding
variable?)1 Point(Does the paper have an
author? -1pt)
3
Introduction (6 points)1. Does the
Introduction section start with the word
Introduction? (1pt) 2. Are there a CLEAR list
of background observations about the a) Great
Salt Lake? (1pt) b) Halobacteria (three
paragraphs) (1pt) c) Is there a Problem Statement
about the GSL lack of biodiversity? (1pt) (Mr.
Fowler will check this for more credit)3. The
experimental Question ex. Does Halo have an
optimum salt concentration for growth? (1pt) 4.
Is there a Hypothesis written in the correct If
(manipulated-salt concentration) Then
(responding-halobacteria growth) format? (1pt)
4

• Materials (2 points)
• The word Materials (Procedure or Protocol is
  acceptable) is listed
• A list of materials is given.
• look for
• Nutrient Broth containing different salt
  concentrations
• Spectrophotometer
• Mr. Fowler will check the rest for more credit.

5

• Methods (7 points)
• The word Methods is listed (1pt)
• A method is outlined in steps (1pt) (Mr. Fowler
  will check this for more credit)
• Includes the fact that samples were in
  triplicate and left to incubate for 72 hrs (1pt)
• Manipulated, Responding, Control variables and
  Experimental control are Listed and described (4
  pts)

6
Results (6 points) 1. The word Results is
clearly written (1pt). 3. A graph is present and
contains the following information in a TAILS
format. (5 pts total).next slide.
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GRAPH 1 point for each of the following

• Graph has an appropriate descriptive TITLE
  (includes M. and R. variables)
• Graph has an X and Y AXIS
• Graph has appropriate INTERVALS (.1,.2,.3, etc)
• Graph has necessary LABELS (x and y axis are
  labeled units of measurements)
• Graph has appropriate SPACING (same distance
  between .1 and .2, etc).

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Conclusion (7 points) (Mr. Fowler will check
this section for more credit)

• The word Conclusion is clearly written. (1pt)
• Restates the hypothesis and/or question (1pt)
• Hypothesis supported or not (1pt)
• Mentions trends in the data, how they relate to
  the hypothesis and gives reference to specific
  data points. (1pt)
• Connects the results to observations about halo
  growth in the Great Salt Lake (north arm is
  saltier, saltier more halo, more halo less
  species diversity). (1pt)
• A discussion of error in the experiment and how
  to improve lab the next time. (1pt)
• Other additional extension experiments. Ex. More
  salt concentrations, different salt, different
  species of halo (1pt)

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Total 28 Points Title 1 Point Introduction 6
Points Materials 2 Points Method 6
Points Results 6 Points Conclusions 7
Points (Dr. Fowler will assign additional points
for quality of the Introduction, Materials,
Method, Conclusion and overall effort, clarity,
and accuracy.Mostly effort!)