Final STEM Renewable energy and green hydrogen

What is a photovoltaic cell?

• A photovoltaic cell is a device that converts mechanical energy into electrical energy.
• A photovoltaic cell is a device that converts heat energy into electrical energy.
• A photovoltaic cell is a device that converts light energy into electrical energy.
• A photovoltaic cell is a device that converts sound energy into electrical energy.

A simple silicon PV cell is like a 0.5V battery, but the current (and therefore power) it can generate depends on its area, and the amount of light (photons) it is receiving.

• True

• False

What does this chart tell us about energy consumption?

• Renewable energy takes up 13% of the total amount of energy consumption

• Petroleum takes up to 35% of the total amount of energy consumption.

• The lowest percent shown is for nuclear electric power.

• Natural gas takes up the largest percent of energy consumption.

Solar cells can be used to convert solar energy to ______ energy. 

• power
• electrical
• expensive
• hot

How does the efficiency of a solar panel change with increased sunlight intensity?

• Decreases

• Increases

• Remains the same

• Becomes unpredictable

What is the role of semiconductors in photovoltaic cells?

• They reflect sunlight

• They store electrical energy

• They convert sunlight into electrical energy

• They insulate the cell

Is wind a renewable or non-renewable resource

• renewable

• non-renewable

• both

• neither

One advantage of solar and wind power over fossil fuels is that

• wind and solar are presently much less expensive than fossil fuels.

• wind and solar come from natural processes and fossil fuels do not.

• wind and solar are nonrenewable resources and fossil fuel are renewable.

• wind and solar are continuously renewable and fossil fuels take millions of years to be formed.

Which of the following is NOT a renewable energy source ?

• Coal

• Wind

• Geothermal

• Hydroelectricity

What kind of power does the Photovoltaic panels produce ?

• AC

• DC

• Heat

• Mechanical