Energy, fossil fuels, and renewable energy Flashcards
Define energy and state its units. (2)
Energy is the ability to do work. It is measured in Joules (J) and Kilojoules (kJ).
List the 8 main forms of energy and can explain them, including gravitational potential energy and elastic potential energy. (8)
- Thermal energy => heat.
- Elastic potential energy =>
the energy stored up in an
elastic object - this includes
springs! - Gravitational potential
energy => energy stored
when an object is high up
due to gravity. - Light energy => waves of
light radiation. - Chemical potential energy
=> energy released when a
chemical reaction occurs. - Kinetic energy =>
movement energy. - Electrical energy => the
energy in electricity. - Sound energy => sound
waves.
State the Law of Conservation of Energy. (1)
Energy cannot be created or destroyed - it can only be transferred from one type to another.
Show how energy can be transferred from one form to another. (1)
A ball is dropped. The gravitiational potential energy of the ball is transferred into kinetic energy as it falls.
Distinguish between and describe conduction,
convection, and radiation. (3)
Conduction is the transfer of heat through direct contact of particles, convection is the transfer of heat through the movement of fluid (liquid or gas) and radiation is the transfer of heat through electromagnetic waves without a medium.
Distinguish between a renewable and non-renewable source of energy. (2)
A renewable source of energy has an infinite supply, and a non-renewable source of energy has a finite supply.
List an example of renewable energy and describe how it can benefit the environment. (2)
Wind is a renewable source of energy. It can benifit the environment because it is a emission-free way of generating electricity.
Define a fossil fuel, how it is formed and give an example. (2)
A fossil fuel is a non-renewable source of energy created in the past from the remains of dead plants and animals. An example is coal.
