| unit/level | component | ||||||
| AS/A: How science works | appreciate the tentative nature of scientific knowledge |
| √√ √ | √√ √ | √√ √ √ | √√ √√ | √ √ |
| PH2.4/AS Matter, Forces and the Universe | describe a simple model for the nuclear atom in terms of nucleus and electrons orbiting in discrete orbits, explaining the composition of the nucleus in terms of protons and neutrons and expressing the nuclear and atomic structures recall that matter is composed of quarks and leptons recall that antiparticles exist, that the properties of an antiparticle are identical to that of its corresponding particle apart from having opposite charge, and that particles and antiparticles annihilate recall the four forces or interactions, which are experienced by particles recall that quarks are never observed in isolation, but bound into composite particles called hadrons | √ √ √ | √ √ √√ √ √ | √ √ √√ √ √ | √ √ √√ √ √ | √ √ √ | |
| PH2.5/A2 Using radiation to investigate stars | recall that the analysis of stellar spectra reveals that roughly 75% of the universe, by mass, is Hydrogen and 24% Helium, with very small quantities of the other elements | √ | |||||
| PH4.5/A2 Application to orbits in the solar system and the wider universe | Missing mass in galaxies � Dark Matter:appreciate that the orbital speeds of objects in spiral galaxies implies the existence of dark matter | √ | √√ | √√ | √√ | ||
| PH5.2/A2 B-fields | describe quantitatively how ion beams, i.e. charged particles, are deflected in uniform electric and magnetic fields apply knowledge of the motion of charged particles in magnetic and electric fields to linear accelerators, cyclotrons and synchrotrons. | √√ √√ | √√ √√ | √√ √√ | |||
| PH5.4/A2 Radioactivity and radioisotopes | Applications of radioactivity: describe briefly the use of radioisotopes (any two applications) | √√ | |||||
| Option A2/D Biological Measurement and Medical Imaging | Positron emission tomography (PET) scanning and its use in detecting tumours | √√ |