Year 9 Physics

4. - The measure of energy transfer when a force moves an object through a distance.
10. - A type of wave where the oscillations are perpendicular to the direction of energy transfer.
11. - A quantity that has magnitude only, such as speed or distance.
14. - The number of wave oscillations per second, measured in Hertz.
15. - A region of high pressure in a longitudinal wave where the particles are closest together.
16. - The mass per unit volume of a substance.
18. - A region of low pressure in a longitudinal wave where the particles are furthest apart.
19. - A quantity that has both magnitude and a specific direction.
20. - The SI unit of pressure, equivalent to one Newton per square metre.

1. - A wave where the oscillations are parallel to the direction of energy transfer.
2. - The maximum displacement of a point on a wave away from its undisturbed position.
3. - The rate of change of displacement; speed in a given direction.
5. - The energy store associated with a moving object.
6. - Energy that is wasted and transferred to the surroundings, usually as thermal energy.
7. - A vector quantity describing the distance and direction of an object from its starting point.
8. - The changing of direction of a wave when it enters a different medium due to a change in speed.
9. - The energy required to change the state of 1kg of a substance without changing its temperature.
11. - The heat energy required to raise the temperature of 1kg of a substance by 1 degree Celsius.
12. - The direct transition of a substance from a solid to a gas without becoming a liquid.
13. - How pressure and volume are proportioned for a gas at a constant temperature.
17. - The total kinetic and potential energy of all the particles that make up a system.
21. - The temperature scale that starts at -273 degrees Celsius, where particles have minimal kinetic energy.