Target Performances
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Lesson 5 – Other Examples of Combustion (students as explainers) |
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(Optional) Activity 5.1: Molecular Models for Methane Burning (40 min) |
Students use molecular models to explain how carbon, oxygen, and hydrogen atoms are rearranged into new molecules during the oxidation of methane (the chemical change that happens when methane burns). |
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(Optional) Activity 5.2: Explaining Methane Burning (40 min) |
Students explain how matter moves and changes and how energy changes when methane burns (connecting macroscopic observations with atomic-molecular models and using the principles of conservation of matter and energy). |
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Activity 5.3: Preparing for Future Units: Organic vs. Inorganic (40 min) |
Students distinguish between organic and inorganic materials on the basis of both their functions (organic materials include foods, fuels, and the bodies of living things) and the chemical structure of their molecules (organic materials contain high-energy C-C and C-H bonds). |
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Activity 5.4: Explaining Other Examples of Combustion (50 min) |
Students explain how matter moves and changes and how energy changes when other organic fuels burn, including (a) wood burning in a fireplace, (b) propane burning in a gas grill, and (c) octane burning in an internal combustion engine. |
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Activity 5.5: Systems and Scale Unit Posttest (40 min) |
Students show their end-of-unit proficiencies for the overall unit goal: Questioning, investigating, and explaining how matter and energy changed during combustion of organic materials. |
NGSS Performance Expectations
Middle School
- Structures and Properties of Matter. MS-PS1-1. Develop models to describe the atomic composition of simple molecules and extended structures.
- Chemical Reactions. MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
- Chemical Reactions. MS-PS1-5. Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.
High School
- Chemical Reactions. HS-PS1-4. Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
- Chemical Reactions. HS-PS1-7. Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.