Energy Resources and Transfers

This set of flashcards covers key concepts related to energy resources, transfers, and efficiency, helping to reinforce important vocabulary and definitions for exam preparation.

Energy

The capacity to do work or produce heat; it exists in multiple forms, such as kinetic, potential, thermal, etc.

Energy Stores

Different forms in which energy can be stored, such as chemical, thermal, kinetic, and potential.

Closed System

A system where neither matter nor energy can enter or leave, resulting in a net change in total energy of zero.

Kinetic Energy

The energy possessed by an object due to its motion, dependent on its mass and speed.

Gravitational Potential Energy (GPE)

The energy stored in an object as a result of its vertical position or height in a gravitational field.

Specific Heat Capacity

The amount of energy required to raise the temperature of 1kg of a substance by 1°C.

Power

The rate of energy transfer or the rate at which work is done, measured in watts.

Efficiency

A measure of how much input energy is converted to useful output energy, expressed as a percentage.

Conduction

The process of heat transfer through direct contact of particles, occurring mainly in solids.

Convection

The process of heat transfer in fluids (liquids and gases) through the movement of warmer and cooler regions of the fluid.

Renewable Energy Resources

Energy resources that can be replenished naturally, such as solar, wind, and hydroelectric power.

Non-Renewable Energy Resources

Energy resources that exist in limited quantities and will eventually run out, such as fossil fuels and nuclear energy.

Work Done

The energy transferred when a force moves an object over a distance, often associated with changes in energy stores.

Thermal Insulation

Materials or methods used to reduce the rate of heat transfer from a warmer to a cooler area.

Lubrication

The application of a substance (like oil) to reduce friction between surfaces in relative motion.

Electrostatic Energy Store

Energy stored in charged objects due to their positions relative to one another.

Nuclear Energy Stores

Energy stored in the nucleus of atoms, released during nuclear fission or fusion.