What is the main goal of using alternative energy sources?

• To increase fossil fuel consumption

• To minimise environmental impact

• To reduce energy efficiency

• To increase pollution

What do photovoltaic cells do?

• Convert sunlight into heat

• Store energy for later use

• Convert sunlight directly into electricity

• Use mirrors to focus sunlight

What is the primary function of solar thermal systems?

• Convert sunlight into electricity

• Heat water or air for domestic or industrial use

• Store energy for cloudy days

• Generate steam to drive turbines

What role does a compressor play in a heat pump?

• Decreases the temperature of the extracted heat

• Increases the temperature of the extracted heat

• Distributes heat throughout the building

• Extracts heat from the environment

What is the effect of a heat pump on a cool space?

• Makes the cool space warmer

• Makes the cool space cooler

• Has no effect

• Increases humidity

What is the role of turbines in hydroelectric power generation?

• To store water at a higher elevation

• To convert potential energy to kinetic energy

• To turn and drive generators

• To release water through tunnels

What is the main function of wind power?

• To generate heat

• To convert kinetic energy into electricity

• To store energy

• To reduce noise pollution

What is used to minimise air pollution in modern incineration plants?

• Turbines

• Boilers

• Scrubbers and filters

• Generators

What happens to the heat generated during incineration?

• It is released into the atmosphere

• It is used to boil water

• It is stored for later use

• It is wasted

What is a key factor influencing the feasibility of geothermal energy projects?

• The color of the soil

• The accessibility and temperature of geothermal resources

• The amount of sunlight

• The presence of wildlife