Energy

Question 1

Name the nine types of energy

Answer 1

1. Electrical
2. Light
3. Sound
4. Kinetic
5. Nuclear
6. Thermal
7. Gravitational potential energy
8. Elastic potential energy
9. Chemical

Question 2

What makes an efficient device

Answer 2

The less energy wasted the more efficient it is

Question 3

Sankey diagrams

Answer 3

They are used to show how much input energy is usefully compared with how much is wasted

Question 4

Radiation

Answer 4

Transfer of heat energy by electromagnetic waves and the emission of thermal radiation that occurs in solid liquids and gases

Question 5

Conduction

Answer 5

Where vibrating particles pass on their extra kinetic energy to neighbouring particles

Question 6

Convection

Answer 6

Transfer of energy by the more energetic particles moving from the hotter region to the cooler region

Question 7

Objects and heat radiation

Answer 7

1. An objects that’s hotter than its surroundings emit more radiation than it absorbs
2. An object that’s cooler than its surroundings absorbs more radiation than it emits

Question 8

Loft insulation

Answer 8

Fibreglass wool prevents heat loss by conduction and radiation

Question 9

Double glazing

Answer 9

Two layers of glass with a narrow gap between reduces conduction and convection

Question 10

Draught proofing

Answer 10

Strips of foam around doors and window prevents convection

Question 11

Cavity wall undulations

Answer 11

Foam squirted between bricks stop convection and radiation but prevents conduction

Question 12

Work

Answer 12

When a force moves an object, energy is transferred and work is done

Question 13

Power

Answer 13

The rate at which something is done

Question 14

Features of non-renewable energy

Answer 14

1. They will run out
2. Damage the environment
3. Supply most of our energy

Question 15

Typical power station

Answer 15

1. Fuel
2. Boiler
3. Turbine
4. Generator
5. Grid

Question 16

Features of geothermal energy

Answer 16

1. Only possible when hit rock lie near the surface

2. Water pumped down tot eh hot rocks and are forced up due to pressure which drives the generator etc

Question 17

Wave energy

Answer 17

1. Wave coverters are dotted around the coast
2. The up and down motion drives generators
3. Kinetic energy of waves is converted to electrical energy

Question 18

Generating electricity through water

Answer 18

1. Tidal barriers are big damns with turbines in them
2. Tide comes in and the water is allowed out at a controlled speed
3. Drives the turbine
4. Kinetic energy is converted to electrical energy