Across
- 6. The average kinetic energy of the particles in a substance, measured in degrees Celsius (°C).
- 8. The amount of matter in an object, measured in kilograms (kg).
- 10. The unit of energy.
- 11. An object or group of objects.
- 12. The energy stored in chemical bonds.
- 15. A material that does not allow energy to transfer through it easily.
- 16. Useful energy transferred by a device divided by the total energy supplied to the device, or useful power output divided by total power input.
- 17. A substance used in nuclear reactors to transfer energy through fission.
- 18. A finite energy resource formed over millions of years from the remains of dead plants and animals. Examples are coal, oil and natural gas.
- 19. The mass per unit volume of a substance, measured in kilograms per metre cubed (kg/m3). It is calculated by dividing the mass of an object by its volume.
Down
- 1. A way in which energy can be kept in a system (enabling the calculation of the ability of a system to do work).
- 2. The transfer of energy from one energy store to another.
- 3. The unit of power
- 4. The amount of energy required to raise the temperature of one kilogram of a substance by one degree Celsius, measured in joules per kilogram per degree Celsius (J/kg °C).
- 5. A measure of the stiffness of a spring, measured in newtons per metre (N/m).
- 7. The energy store of a moving object.
- 9. A liquid or a gas
- 13. Useful energy transferred by a device divided by the total energy supplied to the device, or useful power output divided by total power input.
- 14. Something with a high energy density.
- 20. The capacity of a physical system to perform work.