Physics Energy Part 4

What is the primary energy source for the majority of electricity generation worldwide?

• Solar power

• Fossil fuels

• Nuclear power

• Wind energy

Which energy source uses the movement of water to generate electricity?

• Biomass

• Geothermal

• Hydroelectricity

• Nuclear

Explain why energy cannot be created or destroyed, according to the law of conservation of energy.

• Energy is always lost in a system.

• Energy can only be transferred or transformed.

• Energy is created from nothing.

• Energy is destroyed when used.

Identify the form of energy that is often considered less useful when transferred out of a system.

• Kinetic energy

• Potential energy

• Thermal energy

• Chemical energy

• 15 J

• 50 J

• 5 J

• 100 J

Which energy source became more widely used in the 1950s alongside nuclear power?

• Wind energy

• Solar power

• Biomass

• Geothermal

Describe the difference between heat and temperature.

• Heat is a measure of kinetic energy, while temperature is energy transferred.

• Heat is energy transferred, while temperature is a measure of kinetic energy.

• Both heat and temperature are the same.

• Heat is energy stored, while temperature is energy transferred.

• 80%

• 100%

• 20%

• 50%