Energy

Question 1

Principle of conservation of energy

Answer 1

Energy cannot be created or destroyed, it can only be changed from one form to another

Question 2

Work done

Answer 2

Work done is a measure of energy transferred

Question 3

Power

Answer 3

Power is the rate of doing work

Question 4

Kinetic energy

Answer 4

An objects movement

Question 5

Potential energy

Answer 5

The energy a body has because of its position or condition

Question 6

Expansion

Answer 6

When a substance expands from being heated. The expansion of gases is much greater than the expansion of solids

Question 7

Non-renewable energy sources

Answer 7

Fossil fuel: Burning fossil fuels causes greenhouse gases such as carbon dioxide and sulphur dioxide. This increases the rate at which global warming occurs

Nuclear power: Generates nuclear waste matter with incredibly long half lives

Question 8

Renewable energy sources

Answer 8

Solar, wind, wave, tidal & hydroelectric, geothermal, biomass (vegetable fuel)

Question 9

Conduction

Answer 9

Conduction is the flow of heat through matter from places of higher temperature to places of lower temperature without movement of the matter as a whole

Question 10

Convection

Answer 10

Convection is the flow of heat through fluid from places of higher temperature to places of lower temperature by movement of the fluid itself

Question 11

Radiation

Answer 11

Radiation is the flow of heat from one place to another by means of electromagnetic waves