explain how Semester B completes the full-year course’s standards and area D case, and where it stops so that the separate Physics course is not duplicated.
Completing the full-year course. Physical Science is one UC area D course taught in two semesters. Semester A covered matter and its interactions (HS-PS1-1 to 8, HS-PS2-6). Semester B covers the rest of the physical science performance expectations: forces and motion (HS-PS2-1 to 5), energy (HS-PS3-1 to 5) and waves and information (HS-PS4-1 to 5). The engineering standards are split: HS-ETS1-1 and ETS1-3 appear in both semesters; HS-ETS1-2 (breaking a problem into smaller ones) and HS-ETS1-4 (using a computer simulation to test solutions) are taught in Semester B’s two design units. The validator checks that every one of the 24 HS-PS expectations and all four ETS1 expectations is cited across the two semesters.
Area D evidence in Semester B. Each unit’s Investigation Lab is hands-on and fully written up: carts pulled by hanging washers (Unit 1), electromagnets and a moving magnet in a coil (Unit 2), mixing hot and cold water (Unit 3), and waves on a stretched spring (Unit 4). Semester B adds more hands-on work than Semester A: the padding test and the crash-cushion design challenge in Unit 1, the bouncing-ball measurements and the solar oven in Unit 3, and the glow-material photon lab in Unit 4. Two performance tasks are full engineering cycles with iterations and tests, which reviewers value.
Where Physical Science stops and Physics begins. The separate Physics course (grades 11-12) treats the same HS-PS2 to PS4 expectations quantitatively, with vectors, trigonometry, more algebra and the RST.11-12 literacy band. Physical Science deliberately does not: motion is in one dimension; forces are added along a line; energy is calculated with KE = ½mv2, PE = mgh and Q = mcΔT; Newton’s law of gravitation and Coulomb’s law are used mainly as ratios; photon energy is compared rather than derived. If a strong student wants more, point them to the Physics course rather than adding its content here; the conceptual depth of this course is the preparation.
Counseling. A student who completes Physical Science A and B has covered all of HS-PS1 to PS4 at a conceptual level and one full year of area D. It is a sound grade 9 or 10 choice before Biology, and it does not replace Physics for students heading to engineering or physical-science majors, who should take Physics later.
Where Semester B’s performance expectations are taught
| Performance expectation | Primary lessons | Where it is assessed |
|---|---|---|
| HS-PS2-1 Newton’s second law | 1.1, 1.2 | 1.2 cart lab; Unit 1 checkpoint |
| HS-PS2-2 Momentum conservation | 1.3 | 1.3 argument; checkpoint |
| HS-PS2-3 Collision device | 1.4, 1.5 | 1.5 Crash Cushion Design Challenge |
| HS-PS2-4 Gravitation and Coulomb’s law | 2.1, 2.3 | 2.3 argument; 2.5 explainer |
| HS-PS2-5 Current and magnetic fields | 2.2, 2.4 | 2.2 lab; 2.5 explainer |
| HS-PS3-1 Computational energy model | 3.3, 3.5 | 3.3 spreadsheet; 3.5 report |
| HS-PS3-2 Kinetic and field energy | 3.1 | Unit 3 checkpoint |
| HS-PS3-3 Energy-conversion device | 3.4, 3.5 | 3.5 Energy Device Design Report |
| HS-PS3-4 Thermal energy transfer | 3.2 | 3.2 lab |
| HS-PS3-5 Fields and energy | 2.4, 2.5 | 2.5 From Wind to Wire |
| HS-PS4-1 to 5 Waves and information | 4.1-4.4 | 4.2 lab; 4.3 argument; 4.5 ShakeAlert Explainer |
| HS-ETS1-2 and HS-ETS1-4 | 1.4, 1.5, 3.4, 3.5 | Design challenges and spreadsheet or PhET models |
HS-ETS1-2 and HS-ETS1-4 must be taught in Semester B because Semester A does not cite them.
How confident are you that you can explain how Semester B completes the course and where it stops short of Physics?