Energy Y7

This type of energy is from ancient swamps and is mined to produce the most amount of electricity.

• coal

• biomass

• hydroelectric

• thermal

Answer explanation

Coal is formed when dead plant matter submerged in swamp environments is subjected to the geological forces of heat and pressure over hundreds of millions of years.

This type of energy is a fossil fuel and is refined from crude oil making types of fuel and thousands of products.

• biomass

• thermal

• petroleum oil

• nuclear

Which form of energy does a moving object possess?

• potential

• light

• thermal

• mechanical

A battery is a form of what energy?

• electric

• kinetic

• chemical

• thermal

Which device can use chemical energy to produce sound?

• generator

• television

• microwave oven

• radio

Which of the following can transform electrical energy into light energy?

• hot iron

• radio

• fluorescent light

• an electric kettle

Which of the following gives the correct order of energy transformation in a burning candle?

• chemical-light-light

• chemical-thermal-light

• thermal-chemical-light

• thermal-light-chemical

Answer explanation

Burning of a candle produces heat and light, it requires a chemical reaction to burn a candle. So, there is a transformation of the energy from chemical energy to heat and light energy. Therefore, the energy changes in the burning of a candle as chemical energy is converted to heat and light energy.

This type of energy uses the air in motion from the uneven heating of the earth to heat or produce electricity.

• wind

• solar

• kinetic

• hydroelectric

Answer explanation

Wind energy harnesses the kinetic energy of moving air by using large wind turbines located on land (onshore) or in sea- or freshwater (offshore).

This type of energy is from the nucleus of an atom

• solar

• thermal

• nuclear

• potential

Answer explanation

Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity.

Lightning converts _______ energy into light, thermal and ________ energy

• thermal,

  kinetic

• electrical,

  sound

• thermal,

  mechanical

• potential,

  electrical

Answer explanation

Lightning is a giant spark of electricity in the atmosphere between clouds, the air, or the ground.

Lightning converts electrical energy into light, heat and sound energy.