HS-PS1-4

SCUSD NGSS Curriculum Guide ====**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. ** [Clarification Statement: Emphasis is on the idea that a chemical reaction is a system that affects the energy change. Examples of models could include molecular-level drawings and diagrams of reactions, graphs showing the relative energies of reactants and products, and representations showing energy is conserved.] [//Assessment Boundary: Assessment does not include calculating the total bond energy changes during a chemical reaction from the bond energies of reactants and products.//] ====

Science Background for the Teacher:
See your credential.

Key Vocabulary:

 * chemical reaction || absorption || system || surroundings ||
 * reactants || products || energy ||  ||

Possible Assessments (formative and/or summative):
[Description of assessment task]

Key Student Activity:
Lab solid zinc mixed with iodine solution is exothermic.

Key Teacher Demo/Activity:
[Description of teacher demo or activity. Include necessary materials, if known.]

Common Student Misconceptions:
[Descriptions of common student mistakes or misconceptions related to this topic.]

Things to Avoid/Correct:
[Descriptions of imprecise language or other mistakes related to this topic that might have to be corrected at a higher grade band.]

====Other Resources (text, video, simulations, activities, models, etc..): ====

[Descriptions or links to other resources that would support student understanding of this topic or mastery of this performance expectation.]