Standard 2/Middle School/Benchmark 2
Benchmark Question: What happens to matter when it
undergoes a chemical change?
Focus Question: What are the reactants and products
when paper burns?
Students will work in small
groups and brainstorm lists of different changes they have observed in
matter. One student will cut paper into pieces and place the paper into an
aluminum pie pan. The teacher should remind students that this is a
physical change (SCI.IV.2.MS.1).
The students should
carefully burn the paper in the pie pan. Each student will draw and
describe the reactants involved in burning the paper. Reactants should
include the sulfur on the match head, oxygen, and carbon (paper pieces).
Each student will describe the chemical change and draw what they observed.
Specifically, students should do the following:
- Describe the reactants: paper and oxygen in
- Identify the heat and light energy that are
produced when the friction of striking the match on an abrasive
surface ignites the sulfur on the match head and produces a chemical
- Describe that the heat energy from the
burning match causes the paper and oxygen to combine and form the
products of smoke, ash, carbon dioxide, and water vapor
Each student will create a
table , which includes the drawing and observations of the following:
Reactants (before burning)
- paper (cellulose)
- oxygen (invisible in air)
Reactants and Products
- gases (CO2 and H2O)
- heat (flame)
- ashes form
Products (after burning)
- gases (CO2 and H2O invisible in air)