MS-PS1-4

SCUSD NGSS Curriculum Guide


 * MS-PS1-4: Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed. ** [Clarification Statement: Emphasis is on qualitative molecular-level models of solids, liquids, and gases to show that adding or removing thermal energy increases or decreases kinetic energy of the particles until a change of state occurs. Examples of models could include drawing and diagrams. Examples of particles could include molecules or inert atoms. Examples of pure substances could include water, carbon dioxide, and helium.]

Science Background for the Teacher:
Know the difference between evaporation and boiling.

Key Vocabulary:

 * molecule || thermal energy || kinetic energy || inert ||
 * boiling point || vapor || melting point || particle ||

Possible Assessments (formative and/or summative):
See Marie Bacher.

Key Student Activity:
Conduct a lab where students move H2O through its different states (solid to liquid through boiling point to vapor). Graph the data of temperature over time.

Total Physical Response Activity: Have students spread out and wiggle for a gas. Link arms and wiggle for a liquid. Squeeze together and wiggle for a solid. Then, add energy and have students wiggle harder and break apart to spread out to show the movement from solid to vapor.

Put a hot rock into water and track the temperature change of the water. Draw a picture to explain what is happening.

Key Teacher Demo/Activity:
Use dry ice and talk about sublimation.

Microwave a bag of popcorn on one side of the room and measure how long it takes for the scent to get to the students on the other side of the room. Draw a picture of the scent molecules moving through the air.

Common Student Misconceptions:
Students need to know that evaporating and boiling are not the same thing.

Things to Avoid/Correct:
When heating the water to the boiling point, explain that energy is being added, not heat. Heat is a verb, not a noun.

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

Video of Native Americans boiling water with hot rocks.