CIE IGCSE Physics Key Definitions Complete Guide

CIE IGCSE Physics Key Definitions Complete Guide 1. Speed - Calculated as the total distance traveled divided by the total time taken. 2. Velocity - Refers to the speed of an object in a specific direction. 3. Acceleration - Describes how velocity changes over time, calculated as the change in velocity divided by the time taken for the change. 4. Density - Defined as mass divided by volume, indicating how much mass is packed into a given volume. 5. Weight - Represents the force exerted on an object due to gravity. 6. Moment - Refers to the turning effect of a force, influenced by both the force applied and the distance from the pivot point. 7. Scalar - A quantity that possesses only magnitude or size. 8. Vector - A quantity that has both magnitude (size) and direction. 9. Work - Calculated as force multiplied by the distance moved in the direction of the force. 10. Power - Describes how quickly work is done, calculated as the amount of work done divided by the time taken. 11. Pressure - The force exerted on a unit area. 12. Molecule - A tiny particle composed of one or more atoms bonded together. 13. Particle - Any small piece of a substance, which can range from a single molecule to billions of molecules. 14. Temperature - Indicates how hot or cold a body is, measured in degrees Celsius or Fahrenheit. 15. Thermal Energy - Energy that moves into or out of a body through conduction, convection, or radiation.