Key Stage 3
SCIENCE
ENERGY:
ENERGY SAVING
BEHAVIOUR
RESOURCES
res our ce
SHEET
NO2
Sc2 Lesson Resources -­‐ Energy Saving Behaviour Contents 1. Results sheet for monitoring exercise 2. Exercise sheet 1 – Calculating the cost of standby 3. Exercise sheet 2 -­‐ Calculating running costs at home 4. Typical running costs of household appliances 2 3 4 5 RESOURCES
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Key Stage 3
SCIENCE
ENERGY:
ENERGY SAVING
BEHAVIOUR
RESOURCES
1. res our ce
SHEET
Results sheet for monitoring exercise Appliance Power (W) On Standby Off Total Consumption RESOURCES
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NO2
Key Stage 3
SCIENCE
ENERGY:
ENERGY SAVING
BEHAVIOUR
RESOURCES
res our ce
SHEET
NO2
2. Exercise sheet 1 -­‐ Calculating the cost of standby in the school The classroom is not being used over the summer holiday but all the appliances have been left on standby! Your job is to calculate how much this is going to cost the school. The total power consumed by the unused classroom is ...........................W This is the same power as ........................kW (hint -­‐ there are 1000W in 1kW) In one hour the classroom consumes ...........................kWh of electrical energy (hint – this is the same as power) There are ...............hours in one day, so the classroom consumes ............................kWh in one day The price of electricity is around 15p for one kWh, so the unused classroom costs .......................p per day in electricity There are about ....................days in the summer holidays, so the unused classroom cost ........................p over the summer holidays The school has about ............................ classrooms in the school If all appliances in all the school classrooms are left on standby over the summer holidays, the school must pay .............................p or £................................ Every unit of electricity that is generated releases 0.521 Kg of CO2. How much CO2 is being generated by the electricity use in the school each year for appliances that are on standby? ........................................ Kg CO2 (hint, this will be the number of daily kWh x number of classrooms x number of days in the year x 0.521) RESOURCES
2
Key Stage 3
SCIENCE
ENERGY:
ENERGY SAVING
BEHAVIOUR
RESOURCES
res our ce
SHEET
NO2
3. Exercise sheet 2 -­‐ Calculating the cost of appliances at home You are investigating the running costs of appliances you use at home. Pick 6 appliances to investigate and try to find out the running costs. You may find this on the appliance itself, or in an instruction manual, or on the internet. If you can’t find this information just use the average figures from the list provided in the “Typical running costs of household appliances” sheet. The total power consumed by the appliances when they are switched on is .....................W This is the same power as ..................kW (hint -­‐ there are 1000W in 1kW) In one hour the appliances consume ....................kWh of electrical energy (hint – this is the same as power) If the appliances are on for 3 hours a day they consume .....................kWh in one day The price of electricity is around 15p for one kWh, so the appliances cost .................p per day in electricity There are ..................days in a year so the appliances cost .....................p or £....................to run over a year Every unit of electricity that is generated releases 0.521 Kg of CO2. How much CO2 is being generated by the electricity use in your home each year by your appliances? ....................................... Kg CO2 (hint, this will be the number of daily kWh x number of days in the year x 0.521) RESOURCES
2
Key Stage 3
SCIENCE
ENERGY:
ENERGY SAVING
BEHAVIOUR
RESOURCES
res our ce
SHEET
4. Typical running costs of household appliances *Power based on averages and may not reflect the appliances in your home Appliance Usage Power (W)* TV on on standby on on standby on on standby gaming not playing standby gaming not playing standby gaming not playing standby music playing no music playing off first minute after two minutes on 200 5 25 7 100 4 170 120 2 206 203 1.2 96 95 0.4 40 34 0.3 300 120 1000 Digital box DVD/CD player X-­‐Box 360 PS3 (old version) PS3 (new version) Amplifier Hair straighteners Hair dryer Broadband Modem internet being used no internet being used Phone charger charging battery full just plugged into wall 30 30 4 3 2 RESOURCES
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