Test: Energy at work - Year 7 MCQ

Burning coal releases energy from chemical bonds, producing heat energy. This heat is used to generate steam, which drives turbines, similar to how a heating element transfers thermal energy to water in a kettle.

Burning fuel releases energy stored in chemical bonds, which is converted into heat energy. This heat energy is an example of thermal energy, as seen when a heating element transfers energy to water in a kettle.

Kinetic energy is the energy that an object possesses due to its motion. For example, a ball moving after being kicked has kinetic energy.

When fuel is burned, the energy stored in chemical bonds is released primarily as heat energy, which is thermal energy. This process is similar to the example of burning fuel, where chemical energy is transformed into heat.

Chemical energy is stored in the bonds of chemical compounds and is released during chemical reactions, such as burning fuel.

Fuels like coal store energy in the chemical bonds of their molecules. This chemical energy is released during combustion, as in the example of burning fuel.

An open system allows both matter and energy to exchange with its surroundings, such as boiling water in a kettle.

Electricity powering a device, like a light bulb, involves energy transfer through electrical currents. This is an example of electrical transfer, as described when powering devices with electricity.

Heat/radiation transfer involves the transfer of energy through electromagnetic waves or heat, such as sunlight warming the Earth.

Nuclear energy is released when atomic nuclei are broken apart in nuclear reactions, as in the example of energy from nuclear reactions.