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Science Probe I Technology Activities
Chapter 2
Internet
The Law of Conservation of Mass is a scientific law that has been
known for a long time. As a matter of fact, it was first proposed by a
French chemist, Antoine Lavoisier. Conduct an Internet search to find
out how it is used in the chemical manufacturing industry or some other
similar industry. Chemists use this law to predict how much and how many
products they can expect from a chemical reaction that is used to make
a consumer material such as gasoline, pharmaceuticals, or plastic. As
an alternative, you could search for information about the experiments
performed by Lavoisier that demonstrated to him the Law of conservation
of mass. Prepare a poster, a collage, or a multimedia presentation that
communicates the use of this law in industry to your classmates. Below
is a web site to get you started:
History of Chemistry
http://www.chemistrycoach.com/history_of_chemistry.htm
Application Software
Activity 2B – Use a database program
to make your data table. All fields should be created as text fields except
"Procedure step," which should be a number field. Display the database
file in the List View, which allows you to see the important parts of
the file all at once. Take notes in the database as you perform the activity.
Use the sort function to group each physical state (solids, liquids, and
gases) together. Save this sort and then use the sort function again to
group by the type of change, either physical or chemical. This allows
you also to see the characteristics of physical and chemical changes.
Print the two sorts, and secure them in your SCIENCE PROBE Logbook where
you will answer the discussion questions.
Activity 2D – Use a spreadsheet program
for a class data table, as shown in Table 2.4 of this activity, in which
all students may record their data. Use the mathematical function of the
spreadsheet to make all calculations of mass difference and the average
difference for all groups performing the activity. Transfer the document
to a presentation program, and present the findings to your classmates.
Print the data table, and secure it in your SCIENCE PROBE Logbook where
you will answer the discussion questions.
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