jaro_vrastiakCP8b Vector diagrams - resultant force, balanced unbalanced forces, scale diagram, component vector (0)
jaro_vrastiakCP9b Current and potential difference - ampere, ammeter, volt, voltage, voltmeter, electric current (0)
jaro_vrastiakCC14c Catalysts and activation energy - reaction profiles, catalytic converter, enzymes (0)
jaro_vrastiakCP9a - Electric circuits - free electrons, series circuit, parallel circuit, conventional flow (0)
jaro_vrastiakCB6c - Absorbing water and mineral ions -root hair cells, concentration gradient, diffusion, osmosis (0)