Across
- 3. the process of changing energy from one form to another.
- 4. the process by which an unstable atomic nucleus loses energy by radiation.
- 5. a path along which the whole current flows through each component.
- 7. the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases.
- 10. the emission of electrons or positrons
- 12. comprises branches so that the current divides and only part of it flows through any branch.
- 13. physical phenomenon produced by the motion of charge.
Down
- 1. the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C).
- 2. A measurement of the energy content of food.
- 6. the flow of charge.
- 8. occurs when the nucleus of an atom becomes unstable (the ratio of neutrons to protons is too low) and alpha particles are emitted to restore balance.
- 9. the emission of energetic photons.
- 11. the time taken for the radioactivity of a specified isotope to fall to half its original value.