Science Energy Sem 2 Flashcards
Heat Energy
Defined as energy transit from a high temperature to a lower temperature.
Light Energy
Is the form of waves that produced incandescent objects or electrical discharge
Electrical Energy
Energy of charge particles produced by generators, batteries, solar cells etc.
Gravitational PE
Energy stored in an object above the ground. The further an object is lifted off the ground, the more GPE it has.
Elastic PE
Energy stored in a stretched or compressed spring or elastic material. Amount of elastic PE produced depends on ‘stretchiness’ of material.
Chemical PE
Energy is stored in substances eg. food and fuels.
Nuclear PE
Energy stored inside atoms, which can be released in nuclear power plants or nuclear bombs.
Energy Changes
Energy can either be transferred or transformed or both
Transferred Energy
From one object to another. Meaning it stays the same type of energy, but moves from one object to another.
Transformed Energy
From one form to another. This means it stays the same object but turns into a different type.
Convection
When a hot fluid rises and cools and sink back down, which can cause circular motion of heat transfer.
Conduction
A hotter object touches a cooler object will transfer heat through conduction. Particles at a higher temperature have more kinetic energy & vibrate faster, bumping into nearby particles, making them vibrate more
Radiation
Transfer of heat through infrared waves (a type of electromagnetic waves). Travels as the speed of light.
Internal Energy
Is the total of all kinetic and potential energy of all particles in an object.
