MS-PS1-4
The standard
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.
Next Generation Science Standards
What this standard means
Students need to show what happens to particles in one pure substance as heat is added or removed. They should connect particle motion to temperature, then explain why temperature can pause during melting, freezing, boiling, or condensing while energy still changes the state.
Mastery looks like a clear particle model with spacing, motion arrows, labels, and a written prediction for heating or cooling. Students often think particles expand, disappear, or get hotter during a phase change. They also mix up heat and temperature, or draw solids, liquids, and gases without showing motion differences.
Ways to teach it
- Have students use beads in a tray to model solid, liquid, and gas particle spacing and motion as you call out heating or cooling.
- Ask students to explain why boiling water stays near the same temperature while the stove keeps adding energy.
- Give students three particle diagrams and ask them to rank temperature, motion, and state, then justify one ranking.
- Connect to dry ice by having students model solid carbon dioxide changing directly to gas without becoming liquid.
Plan a lesson for MS-PS1-4
Generate a complete lesson plan aligned to this standard, with objectives, activities, and materials. Free, no account needed.
Related standards
- HS-PS3-2
Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as either motions of particles or energy stored in fields.
- MS-PS3-2
Develop a model to describe that when the arrangement of objects interacting at a distance changes, different amounts of potential energy are stored in the syst...
- HS-PS3-1
Create a computational model to calculate the change in the energy of one component in a system when the change in energy of the other component(s) and energy f...
- 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.