Unit 2: Atoms, Molecules, and Energy

Performance Expectations:

• MS-PS1-1: Develop models to describe the atomic composition of simple molecules and extended structures.

• MS-PS1-4: Develop a model that predict and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.

• MS-PS1-6: Undertake a design project to construct, test, and modify a device that either releases or absorbs thermal energy by chemical processes.

• MS-PS3-3: Apply scientific principles to design, construct, and test a device that either minimizes or maximizes thermal energy transfer.

• MS-PS3-4: Plan an investigation to determine the relationships among the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample.

Essential Questions:

• What is the difference between atoms and molecules?

• How do atoms combine to form molecules and extended structures?

• How are molecules arranged and how do they move in relation to their state of matter?

• What is thermal energy?

• How does particle motion change when thermal energy is added or removed?

Disciplinary Core Ideas, Science & Engineering Practices, Crosscutting Concepts, Supporting Standards:

• • MS-PS1-1

  • MS-PS1-4

  • MS-PS1-6

  • MS-PS3-3

  • MS-PS3-4

Concepts & Skills:

• The students will know...

  • Atoms combine to form molecules.

  • Molecules can combine to form repeating patterns/extended structures.

  • The basic components of the periodic table.

  • That the level of energy changes as matter changes state.

  • What thermal energy is and how it can change.

  • Molecular motion changes as the amount of thermal energy changes .

  • The relationship between temperature and pressure.