Greenhouse Gases

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Author: Cy Ashley Webb

Author: Danielle Abadam


Eighth, Ninth, Tenth


Chemistry, Physical Science


In this experiment, you will find out how human error can cause faults in any science task. This includes experiments conducted by famous scientists also.

Research Questions: Is it possible to perform each calculation of data precisely to get an exact answer? If you need 50g of water, is it possible to pour 50g of water all the time? Explain. If you round an answer during a calculation, does it change your answer considerably? Why or why not?


  • Graduated cylinder
  • Pipette with a safety bulb
  • Beaker
  • Water
  • Electronic balance


Experimental Procedure:

Data Table:

Item’s Weight: Trial 1 Trial 2 Trial 3 Graduated Cylinder With Water Water’s mass in cylinder (Cylinder’s weight with water – cylinder’s weight without water.) Pipette with water Water’s mass in pipette Beaker with Water Water’s weight

Concepts: precision, human error, rounding numbers  

  1. Weigh the graduated cylinder with the electronic balance and record the weight on the table.
  2. Put 100g of water in the graduated cylinder and then weigh the cylinder with care so that the water does not spill.
  3. Calculate the difference between the weight with the water and the weight without the water.
  4. Repeat steps 1-3 again 2 more times.
  5. Repeat steps 1-4 with your pipette (10g) and beaker (100g) and record your observations.
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