9.5 Sources Of Energy

Which of the following is not a renewable source of energy?

• biofuels

• fossil fuels

• geothermal energy

• solar energy

A power station is designed to produce __________ energy.

• chemical

• electrical

• heat

• nuclear

Which is the correct order of energy conversion in a fossil fuel power station?

1. chemical potential energy

2. electrical energy

3. heat energy

4. kinetic energy (turbine)

• 1->2->3->4

• 1->3->4->2

• 3->1->4->2

• 4->3->1->2

Which sources of energy, when harnessed, can cause air pollution?

1. biofuels

2. fossil fuels

3. nuclear energy

4. wind energy

• 1, 2 only

• 2, 3 only

• 1, 4 only

• 3, 4 only

This clean source of energy can generate radioactive substances.

• biofuels

• geothermal

• nuclear

• solar

Why is wind energy not being harnessed in Singapore?

• lack of expertise (know-how)

• lack of rivers

• lack of strong winds

• shortage of large plots of land

Which renewable source of energy has Singapore been harnessing to produce electricity?

• biofuels

• geothermal

• hydro

• solar

Heat energy stored in the Earth's core is ____________ energy.

• biofuel

• geothermal

• nuclear

Diagram shows a geothermal power plant. State the energy conversion from step 1 to step 4.

Burning of fossil fuels has negative impacts on the environment. What are these impacts?

1. cause air pollution

2. release greenhouse gases

3. release of heat

4. global warming

• 1 and 2 only

• 3 and 4 only

• 2 and 3 only

• 1, 2 and 4 only