Energy Generation and materials

Which of the following statements about fossil fuels is false?

• Fossil fuels are burned to create heat, which fires steam-driven turbines

• Fossil fuels include gas, oil and coal

• Fossil fuels produce no CO₂ when burned

• Fossil fuels cannot be replaced as fast as they are being used

Explain how fossil fuels are used to produce electricity.

Explain how shale gas is produced by fracking (hydraulic fracturing).

Which one of the following is a type of kinetic energy?

• Mechanical

• Sound

• Chemical

• Nuclear

Which one of the following statements is false?

• Nanomaterials are between 1 and 1000 nanometres in size

• Graphene is a carbon lattice structure one atom thick

• Biodegradable polymers are made from petrochemical resources

• Information is transmitted down fibre optic cables using pulses of light

Explain why biodegradable polymers are considered to be CO₂ neutral.

Which smart material would be suitable for medical hip replacements?

• Titanium

• Graphene

• Carbon Fibre

• Fibre Optics

Pneumatic systems move compressed ______ to create movement.

• Oil

• Gas

• Water

Battery's store what type of energy?

• Kinetic

• Potential

• Chemical

• Thermal

Why is it desirable for a nation to provide electricity from a variety of different sources?