P1-Energy Stores And Systems

Question 1

What is energy transferred between?

Answer 1

Stores.

Question 2

Name all 8 energy stores?

Answer 2

Thermal, Kinetic, Gravitational Potential, Elastic Potential, Chemical, Magnetic, Electrostatic, Nuclear.

Question 3

What are the ways energy can be transferred?

Answer 3

Mechanically, electrically, heating or by radiation.

Question 4

What happens when a system changes?

Answer 4

Energy is transferred.

Question 5

What is an example of energy being transferred by heating?

Answer 5

Boiling water in a kettle. Water= the system. Energy transferred from water to waters thermal energy stores.

Question 6

What is a system?

Answer 6

Another word for a single object or a group of objects.

Question 7

What is work done?

Answer 7

Energy transferred.

Question 8

When can work done occur?

Answer 8

By a force moving an object. Or when current flows(P2).

Question 9

Describe the energy transfer from a cars breaks?

Answer 9

Friction occurs meaning wheels’ kinetic energy stores to thermal energy of the surroundings.

Question 10

What is specific heat capacity?

Answer 10

Saying how hard it is to heat something up.

Question 11

What is the conservation of energy principle?

Answer 11

Energy can be transferred usefully, stored or dissipated, but can never be created or destroyed.

Question 12

What is dissipated energy?

Answer 12

Known as wasted energy- because the energy is being stored in a way that is not useful.

Question 13

What is power?

Answer 13

Rate of doing work.

Question 14

What is power measured in?

Answer 14

Watts.

Question 15

What are the ways you can reduce energy transferring to a useless store?

Answer 15

Lubrication and thermal insulation.

Question 16

What does lubrication reduce?

Answer 16

Frictional forces.

Question 17

How can lubrication be used?

Answer 17

Reduce the friction between objects’ surface when they move.

Question 18

What are lubricants?

Answer 18

Usually liquids (like oil), so they can flow easily between objects and coat them.

Question 19

How can heating occur?

Answer 19

Conduction and convection.

Question 20

How does insulation reduce the rate of energy transfer?

Answer 20

By heating.

Question 21

Ways to prevent energy loss through heating?

Insulation

Answer 21

Have thick walls made from low thermal conductivity material.
Use thermal insulation- e.g double-glazed windows.

Question 22

What are non-renewable energy resources?

Answer 22

Fossil fuels and nuclear fuels.

Question 23

What are fossil fuels?

Answer 23

Natural resources formed from underground over millions of years.

Question 24

What are the 3 main fossil fuels?

Answer 24

Coal
Oil
Gas

Question 25

Negatives/Positives of non-renewable resources?

Answer 25

They will eventually run out.
They damage the environment.
But they provide most of our energy.

Question 26

What is renewable energy?

Answer 26

Energy that can be re-used.

Question 27

Renewable energy examples?

Answer 27

Sun (solar), Wind, Water Waves, Hydro-electricity, Bio-fuel, Tides, Geothermal.

Question 28

Negatives/Positives of renewable energy?

Answer 28

Will never run out.
Does less damage to environment compared to non-renewable.
However they’re unreliable depending on weather so may not provide as much energy.

Question 29

Examples of renewable and non-renewable energy for heating?

Answer 29

Non-renewable: coal for fireplaces. Natural gas to heat water then pumped into radiators.
Renewable: geothermal heat pump to heat buildings.
Solar water heaters use sun to heat water then pumped to radiators.

Question 30

How does wind power create energy?

Answer 30

Through wind turbines.

Question 31

What is bio-fuel?

Answer 31

Renewable energy created from plant products or animal dung.

Question 32

What is the use of renewables limited by?

Answer 32

Reliability, money and politics.