Worksheets6.13 Energy Conservation + Math
Total questions: 10
Worksheet time: 14mins
A 2000W electric space heater was used for 3 hours and 30 minutes. How much energy did the heater use?
2000W
7000kWh
7kWh
2kWh
6500kWh
Fremont, with a population of 300,000 people, uses 8million Btu of energy each day. The yearly per capita energy consumption in the city is nearest to
10,000BTU
1,000,000Btu
10,000,000Btu
1,000,000,000Btu
10,000,000,000Btu
Which is most likely to conserve energy resources?
using public transportation
using nuclear energy instead of solar energy
turning thermostats up higher in winter
burning coal instead of using hydropower
Which method has the least ecological impact when producing electricity?
coal-fired plants
hydro-electric dams
nuclear power plants
solar panels
How is the efficiency of a device calculated?
(useful energy out divided by total energy in ) x 100
(useful energy out x by total energy in ) x 100
(useful energy in divided by total energy out ) x 100
(useful energy x divided by total energy in )divided by 100
