Radiation Vocabulary

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.

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.