11. GCSE - Energy Definitions

What is the principle of conservation of energy?

• Energy can be created and destroyed.

• Energy is only transferred from one form to another or stored.

• Energy is only stored and never transferred.

• Energy can be destroyed but not created.

Which term describes the energy transferred to surroundings in less useful ways?

• Conserved energy

• Dissipated energy

• Efficient energy

• Potential energy

How is efficiency calculated in energy systems?

• Total energy output divided by useful energy input

• Useful energy output divided by total energy input

• Total energy input divided by total energy output

• Useful energy input divided by wasted energy output

What is the main cause of global warming according to the document?

• Deforestation

• Increased solar radiation

• Burning of fossil fuels releasing carbon dioxide

• Overpopulation

What does the gravitational field strength (g) measure?

• The energy position in a gravitational field

• The force exerted by gravity on each kg of mass

• The potential energy of an object in orbit

• The mass of an object in a gravitational field

What is kinetic energy dependent on?

• The color and texture of the object

• The mass and velocity of the object

• The temperature of the object

• The position of the object in space

What distinguishes non-renewable energy resources from renewable ones?

• Non-renewable resources can regenerate quickly.

• Renewable resources can run out.

• Non-renewable resources will eventually run out.

• Renewable resources are mainly derived from fossil fuels.

What is the unit of power as defined in the document?

• Joule

• Newton

• Watt

• Kilogram

What does the term 'specific heat capacity' refer to?

• The amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius.

• The amount of heat a substance can conduct at a given temperature.

• The maximum heat a substance can store.

• The heat required to change the state of a substance without changing its temperature.

What role does insulation play in energy conservation?

• It increases the energy transfer to the environment.

• It decreases the rate of energy transfer from one object to another.

• It has no effect on energy transfer rates.

• It only affects mechanical energy transfers.