NGSS HS-PS1-8
The Standard
Develop models to illustrate the changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay.
Next Generation Science Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students draw and interpret simple models of fission, fusion, alpha decay, beta decay, and gamma emission. They track changes in protons, neutrons, and element identity. They compare nuclear energy releases with chemical energy releases without calculating amounts.
What Mastery Looks Like
- Students create clear before-and-after nucleus diagrams for each process. Their models account for changes in proton and neutron numbers and identify when the element changes. They show nuclear energy releases as much larger than chemical energy releases.
Common Misconceptions
- Students may think nuclear reactions involve electron shells or destroy matter. They may show gamma emission changing the element, or beta decay changing the mass number. They often confuse fission with fusion.
How to Assess It
- Give students five boxes labeled fission, fusion, alpha, beta, and gamma. Ask them to sketch each change, label particles, and mark whether atomic number or mass number changes.
Lesson moves
Ways to Teach It
Use colored counters for protons and neutrons, then rebuild nuclei to model fission, fusion, alpha decay, beta decay, and gamma emission.
Ask students to explain why gamma emission releases energy without changing the element or its mass number.
Give groups reaction cards to sort by fission, fusion, alpha, beta, or gamma, then require a diagram for each choice.
Match the Sun, a nuclear power plant, a smoke detector, and cancer treatment to the nuclear process each one uses.
Free download
Printable HS-PS1-8 Worksheet
A ready-to-print activity worksheet aligned to HS-PS1-8, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetKeep exploring
Related Standards
- MS-PS1-1
Develop models to describe the atomic composition of simple molecules and extended structures.
- 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.
- 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.
- HS-ESS1-1
Develop a model based on evidence to illustrate the life span of the sun and the role of nuclear fusion in the sun's core to release energy that eventually reac...
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.