Bald Eagle- U.S.A.'s freedoms, spirit and pursuit of excellence Population early 1700s 300,000 to...
4
Bald Eagle- U.S.A.'s freedoms, spirit and pursuit of excellence Population early 1700s 300,000 to 500,000 1960s 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
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Transcript of Bald Eagle- U.S.A.'s freedoms, spirit and pursuit of excellence Population early 1700s 300,000 to...
Bald Eagle- U.S.A.'s freedoms, spirit and pursuit of excellence
Populationearly 1700s 300,000 to 500,000 1960s 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: ( )• 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
• 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
