MS-PS1-5

SCUSD NGSS Curriculum Guide ====**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. ** [Clarification Statement: Emphasis is on law of conservation of matter and on physical models or drawings, including digital forms, that represent atoms.] [//Assessment Boundary: Assessment does not include the use of atomic masses, balancing symbolic equations, or intermolecular forces.//] ====

Science Background for the Teacher:
Teachers need to know how to balance equations. Know how to count.

Key Vocabulary:

 * [key vocab term for this performance expectation] || [key vocab term for this performance expectation] || [key vocab term for this performance expectation] || [key vocab term for this performance expectation] ||
 * atoms || chemical reaction || mass || subscript ||
 * coefficient || molecular formula || law of conservation of mass || reactants ||
 * products || elements || molecules || compounds ||

Possible Assessments (formative and/or summative):
Set up a manipulative station. Have students retrieve the proper manipulatives to make a model that shows a chemical reaction.

Key Student Activity:
Draw a molecular model of a simple chemical reaction.

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

Common Student Misconceptions:
Students think that gases come by themselves, when in fact, they come in pairs.

Things to Avoid/Correct:
Avoid hydrating crystals and other complicated reactions.

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

Online simulations PHET simulations. The water dance (combining hydrogen and oxygen to make water).