10.1

Question 1

Electrical energy

Answer 1

Electrical energy: the energy made available by the flow of electric charge through a conductor

Question 2

Gravitational potential energy

Answer 2

Gravitational potential energy: energy stored due to the height of an object above a base level

Question 3

Chemical energy

Answer 3

Chemical energy: potential energy derived from chemical reactions

Question 4

Elastic potential energy

Answer 4

Elastic potential energy: describes a material that is able to return to its original size after being stretched

Question 5

Nuclear energy

Answer 5

Nuclear energy: the energy stored at the centre of atoms, the tiny particles that make up all substances. Nuclear energy can be released from the radioactive metals uranium or plutonium, and transformed into electrical energy in a nuclear power station.

Question 6

Law of conservation

Answer 6

Law of Conservation of Energy: a law that states that energy cannot be made or lost. However, energy can be transformed from one type to another or transferred from one object to another.

Question 7

Efficiency

Answer 7

Efficiency: the fraction of energy supplied to a device as useful energy. It is usually expressed as a percentage.

Question 8

Efficiency

Answer 8

Efficiency: the fraction of energy supplied to a device as useful energy. It is usually expressed as a percentage.