Question
A power station burns waste materials from farm crops to generate electricity.
State and explain whether this process is renewable.
statement ………………………………………………………………………………………………………………….
explanation ……………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………
[2]
The power station uses some of its waste thermal energy to heat water for houses in a nearby town.
State one problem of using waste energy in this way if the power station is far from the town.
…………………………………………………………………………………………………………………………………
Suggest a way of reducing this problem.
…………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………..
[2]
State two environmental consequences of burning coal to generate electricity.
consequence 1. …………………………………………………………………………………………………………
consequence 2. …………………………………………………………………………………………………………
[2]
[Total: 6]
Answer/Explanation
Ans:
(a)renewable / yes crops can be regrown (to replace resource) / waste materials don’t run out
(b)
water will cool (too much) / thermal energy lost (during transfer)
lag/insulate (pipes) OR transport in a poor conductor of thermal energy
(c)
any two from:
• air pollution / harmful gases / acid rain
• CO2 / greenhouse gases / contribution to global warming
• not renewable
• damage from mining / drilling or any valid environmental consequence of transport of coal