Energy

Question 0

What is the measurement for energy?

Answer 0

Joules (symbol: J)

Question 1

What is the definition for energy?

Answer 1

Energy is the ability to do work or move something

Question 2

Can i state the law of conservation for energy?

Answer 2

Energy can neither be created or destroyed but but it can change from one form to another

Question 3

Can i give 9 examples of different forms of energy?

Answer 3

1. Fossil fuels
2. Solar energy
3. Wind energy
4. Tidal energy
5. Hydroelectric energy
6. Wave energy
7. Biomass energy
8. Geothermal energy
9. Nuclear energy

Question 4

What is a non-renewable form of energy?

Answer 4

Non- renewable sources get used up i.e fossil fuels

Question 5

Do i know the unit for work?

Answer 5

Joules (symbol: J)

Question 6

Can i give examples of stored energy?

Answer 6

• potential energy
• nuclear energy
• chemical energy

Question 7

Can i give six examples of energy in action?

Answer 7

• electrical
• magnetic
• kinetic
• heat
• light
• sound

Question 8

Can i give two advantages of fossil fuels?

Answer 8

• electricity supply is guaranteed (once fuel is there)
• fuel can be stored, extra demand can be catered for
• relatively cheap

Question 9

Can i give two disadvantages of fossil fuels?

Answer 9

• limited supply available
• will get more expensive as supplies dwindle
• it pollutes the air, produces acid rain and increases the greenhouse effect

Question 10

Can i give two advantages of solar energy?

Answer 10

• Free supply will never run out
• no pollution
• solar panels or cells on roof do not interfere with anything

Question 11

Can i give two disadvantages of solar energy?

Answer 11

• initial costs can be very high
• least/no energy at night and in winter when its most needed
• solar energy is spread over a wide area and is difficult to collect

Question 12

Can i give two advantages of wind energy?

Answer 12

• free supply will never run out
• no pollution. Land with wind turbines can still be used for farming
• low level technology costs about 1/5 of what it cost 20 years ago

Question 13

Can i give two disadvantages of wind energy?

Answer 13

• some people thing wind turbines are noisy and unsightly
• many turbines are needed produce as much electricity as one modern power station
• windy sights are essential, the supply is variable and unreliable

Question 14

Can i give two advantages of hydroelectric energy?

Answer 14

• Free supply will never run out
• no pollution and can store energy from other sources
• can be switched on in a matter of seconds

Question 15

Give two disadvantages of hydroelectric energy?

Answer 15

• only a small number of suitable sites
• initial costs are high
• land have to be flooded to make reservoirs

Question 16

What method is used for the experiment to show the conversion of CHEMICAL to ELECTRICAL to KINETIC?

Answer 16

1) place the resistance wire under the cold water in the beaker
2) connect the resistance wire through to the battery and plug it in
3) place the thermometer in the cold water and note the temperature
4) note the temperature every two minutes
5) compare and look at results

Question 17

What method is used for the experiment to show the conversion of ELECTRICAL to MAGNETIC to HEAT energy?

Answer 17

1) wind the insulated wire closely around the nail
2) connect the two wire ends to the battery
3) place some loose thumbtacks/paperclips under the nail
4) switch on the current
5) note what happens
6) turn iff the current
7) nite what happens

Question 18

What method is used for the experiment to show the conversion of LIGHT to ELECTRIC to KINETIC energy?

Answer 18

1) connect the solar cell to the fan
2) place the solar cell under a beam of strong sunlight
3) note what happens
4) block the sunlight from the solar cell
5) again note what happens

Question 19

What are the 3 forms of energy we learnt about thats original sourec isn’t the sun?

Answer 19

1) tidal energy (moon and sun)
2) nuclear energy (nuclei in atoms: splitting in fission joining in fusion)
3) geothermal energy (earth: the decay of radioactive material in the earths core