Fuels

A fuel is a store of...

• electricity.

• power.

• energy.

• gravity.

The fuel used to burn a candle is ...

• coal.

• wax.

• petrol/gasoline.

• wood.

Burning candle wax...

• changes chemical energy into light and heat energy.

• changes electrical energy into light and heat energy.

• changes chemical energy into electrical and heat energy.

• changes electrical energy into sound and heat energy.

Most fuels are ...

• hydrochlorides.

• carbohydros.

• hydrocarbons.

• carbohydons.

A hydrocarbon is made of hydrogen and ...

Fuels react with ....... to release energy.

• nitrogen

• hydrogen

• carbon dioxide

• oxygen

When hydrocrabons are burned in oxygen they release ....

• carbon dioxide and water.

• carbon dioxide and hydrogen.

• water and methane.

• water and hydrogen.

The word equation for burning a hydrocarbon in oxygen to produce carbon dioxide and water is ...

• hydrocarbon + oxygen -> oxygen and carbon dioxide

• hydrocarbon + nitrogen -> water and carbon dioxide

• hydrocarbon + water -> water and carbon dioxide

• hydrocarbon + oxygen -> water and carbon dioxide

A problem with burning hydrocarbons is that they...

• increase the Greenhouse Effect.

• reduce the Greenhouse Effect.

• maintain the Greenhouse Effect.

• start the Greenhouse Effect.

Select the false statement.

• Coal is a non-renewable hydrocarbon.

• Wood is a renewable hydrocarbon.

• Crude oil (gasoline) is a renewable hydrocarbon.

• Natural gas is a non-renewable hydrocarbon.