chemistry enrgy resources

How is electricity generated at a power station?

Electricity is generated from an energy resource.

What role does the National Grid play in electricity supply?

It is a network of pylons and cables that transport electricity.

What is the function of a step-up transformer?

It increases voltage to reduce energy lost as heat.

Name one renewable energy resource.

Wind, solar, tidal, hydroelectric, geothermal, or biofuels.

What is the main advantage of wind energy?

No fuel cost and no pollution.

What is a disadvantage of wind turbines?

Weather-dependent and may cause visual and noise pollution.

How does hydroelectric power generate electricity?

Water falls from a dam, spins turbines, and generates electricity.

What are the advantages of hydroelectric power?

It is very reliable, has instant start-up, and produces no CO₂ emissions.

What is required for wave power to be effective?

Strong waves are needed for consistent energy generation.

How does tidal power work?

Water flows in and out with tides to move turbines inside a barrage.

What is the energy transfer process for solar panels?

Light energy is converted directly into electrical energy.

What is a disadvantage of solar power?

It doesn’t work at night and is less efficient in cloudy conditions.

Where is geothermal power most effective?

In volcanic or geologically active areas.

What is the main benefit of biofuels?

They are renewable and can help reduce waste.

What is a disadvantage of nuclear power?

It produces radioactive waste and can be dangerous.

What is the environmental impact of burning fossil fuels?

It contributes to climate change and causes air pollution.

What are the challenges of transitioning to renewable energy?

High upfront costs and the need for government and company investment.

What is one issue related to energy demand?

The population is growing, leading to increased electricity needs.

How can renewable energy impact the environment positively?

It produces no CO₂ emissions and helps reduce pollution.