Science/Strand IV/Content Standard 1/High School/Benchmark 2
Benchmark Question: How do we describe the things around
Focus Question: How are elements classified?
In this strategy, students
will classify elements according to their physical and chemical properties.
Students will construct a
table using columns with the following headings: name of element, state,
luster, conductivity, reaction with water, and reaction with acid.
The teacher will give groups
of two to four students eight to ten samples of the same identified
elements. Students will examine each sample for the listed properties and
will record their observations in the table. Small groups will conduct
tests for conductivity, reaction with water, and reaction with acid.
Students will respond with “high,” “ low,” or “no.” Groups will compare
their results to the element’s position on the periodic table and identify
any patterns of organization. They will conclude by answering the question,
“How is the periodic table organized?” They will share their findings with
Note: Use a battery powered conductivity
tester from a science supply catalog.