Renewable Energy
What is Renewable Energy?
Energy from sources that can naturally replenish themselves
What is electricity?
The flow of electric charge.
Name one fossil fuel
Coal, oil or natural gas
Name one way households can save energy.
Turn off lights, use LED bulbs, efficient appliances, insulation
What is an independent variable?
The variable that is changed
Name TWO renewable energy sources.
Solar, wind, hydro, geothermal or biomass.
What unit is used to measure current?
Amperes/Amps (A)
Are fossil fuels renewable or non-renewable?
Non-renewable
Why are LED light bulbs considered sustainable?
They use less electricity and last longer
What is a dependent variable?
The variable that is measured
Which renewable energy source uses sunlight to generate electricity?
Solar Energy
What unit is used to measure voltage?
Volts (V)
What gas is released when fossil fuels are burned?
Carbon dioxide
Why is public transport often more sustainable than individual cars?
It reduces fuel use and emissions per person
Why do scientists repeat experiments?
To improve reliability
Why is hydroelectric power considered renewable?
Because the water cycle continually replaces the water used
What material allows electricity to flow easily?
A conductor
Why is burning fossil fuels a concern for the environment?
It increases greenhouse gas emissions and contributes to climate change
A house installs solar panels and insulation. Explain how both improve sustainability.
Solar panels produce renewable energy and insulation reduces energy use.
What is the difference between a qualitative and quantitative observation?
Qualitative uses descriptions; quantitative uses numbers and measurements.
A town uses solar panels during the day but needs electricity at night. What technology could help solve this problem?
Battery storage systems.
In a series circuit, what happens if one component breaks?
The whole circuit stops working
Which fossil fuel is commonly used in Australian power stations?
Coal
A new shopping centre is being built. Name TWO features that could make the shopping centre more sustainable and explain how they would help.
Teacher Judge
A group tested energy-efficient light bulbs but used different bulb brands and different room sizes. Explain why their results may not be valid
Too many variables were changed, so it was not a fair test.