Foundation: P1 - Energy

Question 1

Define mass

Answer 1

Mass: mass is the amount of substance that something contains

Question 2

Define power

Answer 2

Power: power is how much energy is transferred per second

Question 3

Define work done

Answer 3

Work done: work done is the amount of energy transferred by a force

Question 4

Define efficiency

Answer 4

Efficiency: efficiency is how much energy or power is usefully transferred in a process

Question 5

Define specific heat capacity

Answer 5

Specific heat capacity: specific heat capacity is the energy required to raise the temperature of 1 kg of a substance by 1 oC

Question 6

Define dissipated

Answer 6

Dissipated: Energy that is lost to the surroundings and can no longer be used usefully.

Question 7

Define renewable

Answer 7

Renewable: An energy source that can be replenished as it is used up.

Question 8

Define non-renewable

Answer 8

Non-renewbale: An energy source that has a limited supply.

Question 9

State what energy is stored in moving objects.

Answer 9

Kinetic energy is stored in moving objects.

Question 10

State what energy is stored in stretched or squashed objects.

Answer 10

Elastic energy is stored in stretched or squashed objects.

Question 11

State what energy is stored in objects that have been lifted above ground.

Answer 11

Gravitational potential energy is stored in objects that have been lifted above ground.

Question 12

State what energy is stored in objects that have a temperature above absolute 0.

Answer 12

Thermal energy is stored in objects that have a temperature above absolute 0.

Question 13

State the conservation of energy law.

Answer 13

Energy cannot be created or destroyed. It can only be transferred from one store to another.

Question 14

State the equation that links kinetic energy, mass and speed.

Answer 14

Kinetic energy = 0.5 x mass x speed²

Question 15

State the equation that links gravitational potential energy, mass, height and gravitational field strength.

Answer 15

Gravitational potential energy = mass x height x gravitational field strength

Question 16

State the unit for energy.

Answer 16

Joules, J

Question 17

State all of the renewable energy sources.

Answer 17

Solar power, wind power, water (tidal, wave and hydroelectric) power, geothermal and biomass.

Question 18

State all of the non-renewable energy sources.

Answer 18

Fossil fuels (coal, oil and gas) and nuclear power.

Question 19

Explain why biomass could be classed as non-renewable.

Answer 19

Biomass is non-renewable when the crops that have been used do not get replanted.

Question 20

Describe the useful and wasted energy transfers from a lightbulb.

Answer 20

Energy is transferred usefully from the lightbulb to the surroundings in the form of light. Energy is lost and wasted to the surroundings in the form of heat.