Renewable vs Non-renewable
What is energy?
The ability to do work or cause change.
Name one renewable energy source
Solar, wind, hydroelectric.
What is energy conservation?
Behavior changes to use less energy.
What unit measures energy on an electricity bill?
Kilowatt hour (kWh)
What is conduction?
Heat transfer through direct contact.
What does a watt measure?
Electrical power at a moment.
Name one non-renewable energy source.
Coal, oil, natural gas.
What is energy efficiency?
Using technology to do the same job with less energy.
Which component of an electricity bill does not change with usage?
Fixed charge
Give an example of convection.
Warm air rising in a heated room.
Distinguish power from energy.
Power is how fast energy is used; energy is total power over time.
Give a difference between renewable and non-renewable
Renewable replenishes quickly; non-renewable takes millions of years.
Give one example of conservation and one of efficiency.
Conservation: shorter showers
Efficiency: LED bulbs
Which period typically has the highest rate?
On-peak
Give an example of radiation.
Heat from the sun or a fire.
True or False: Energy cannot be created or destroyed.
True
Which energy source is non-renewable: solar, wind, hydroelectric, or coal?
What is an action that is an effective daily energy-conservation strategy?
Ex: Turning off lights when leaving rooms.
Calculate the cost for 100 kWh at $0.20/kWh.
$20
What does a higher R-value indicate?
Higher resistance to heat flow.