Energy

Question 1

Chemical energy

Answer 1

the energy transferred in a chemical reaction

Question 2

Kinetic energy

Answer 2

the energy an object has because it is moving

Question 3

Gravitational potenial

Answer 3

the energy stored in an object becuase of it’s position

Question 4

elastic potential

Answer 4

the energy stored ina springy object when you stretch or squash it

Question 5

thermal energy

Answer 5

the energy a substance has becuase of it’s temperature

Question 6

equation

kinetic energy

Answer 6

Ek = 1/2 m v2

Question 7

equation

Elastic potential

Answer 7

Ee = 1/2 k e2

Question 8

equation

gravitational potential

Answer 8

Ep = m g h

Question 9

Energy transfer

Answer 9

Energy can be transferred usefully, stored or dissipated, but cannot be created or destroyed.

Question 10

equation

efficiency

Answer 10

useful output energy transfer
total input energy transfer

Question 11

reneawble energy sources

Answer 11

biofuels, geothermal, wind, hydroelectic, tidal, wave, solar

Question 12

non-renewable

Answer 12

fossil fuels, nuclear fuels

Question 13

Fossil fuels

Answer 13

• used for electricity, heating and transport
• reliable
• produces green house gasses

Question 14

nuclear fuels

Answer 14

• used for electricity
• reliable
• difficult to dispose of - contamination

Question 15

biofuels

Answer 15

• used for electricity and heating
• reilable
• adds CO2 to atmosphere

Question 16

geothermal

Answer 16

• used for electricity
• reliable
• no emmisions

Question 17

wind

Answer 17

• used for electricity
• unreliable
• no emmisions

Question 18

hydroelectic

Answer 18

• used for electricity
• reliable
• no emmisions
• disrupts habitats

Question 19

tidal

Answer 19

• used for electricity
• unreliable
• expensive

Question 20

wave

Answer 20

• used for electricity
• unreliable
• no emmisions

Question 21

solar

Answer 21

• used for heating and electicity
• unreliable
• no emmisions