Transcript Bald Eagle- U.S.A.'s freedoms, spirit and pursuit of

Bald Eagle- U.S.A.'s freedoms,
spirit and pursuit of excellence
Population
early 1700s
1960s
300,000 to 500,000
less than 1000
Reason:
•shooting of eagles,
•destruction of habitat
•contamination of waterways and food sources by a wide
range of poisons and pollutants
•the use of DDT pesticide on crops caused thinning of
eagle egg shells, which often broke during incubation
Experiment 3-Calcium Carbonate
in Eggshell
• Name:
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• Class
• Aim: To determine the percentage of CaCO3 in
eggshell
• Equations involved
• Theory:
-Introduction
-explain the theoretical principle underlying an
experiment  back titration
-Explain how it can be applied to determine the
objective of the experiment.
.
Experiment 3-Calcium Carbonate
in Eggshell
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Chemicals:
Apparatus:
Procedure: past tense and passive voice
Data and result:
Observation
Calculation: % of CaCO3
• Conclusion
• Discussion
-sources of error(3pts)
-improvement of accuracy of result(3pts)
-what is the role of heating in expt.?
• Question
• 3 and 4