The three states of matter are solids, liquids and gases.
List the three states in order, so the best substance for convection is first, and the worst is last.
Important Questions on Energy
The figure below shows the inside of an electric kettle.
What energy transfer takes place in an electric kettle?
Choose from: Electrical to mechanical/ Mechanical to electrical / Electrical to heat/ Heat to Mechanical
The figure below shows the inside of an electric kettle.
What type of material should the electric element be made from? Explain your answer.
The figure below shows the inside of an electric kettle.
The kettle heats the water at the bottom. Name the process by which the hotter air moves around the kettle.
The figure below shows the inside of an electric kettle.
Draw arrows on the diagram to show the directions in which the water moves as it heats up.
Modern office buildings use large amounts of glass to make the room more brightly lit. The glass has a special coating so that the outer surface is shiny but still allows visible light through the glass.
A room with a large amount of glass can get very hot. What is the process by which heat enters the room?
Modern office buildings use large amounts of glass to make the room more brightly lit. The glass has a special coating so that the outer surface is shiny but still allows visible light through the glass.
State the source of this thermal energy.
Modern office buildings use large amounts of glass to make the room more brightly lit. The glass has a special coating so that the outer surface is shiny but still allows visible light through the glass.
Explain why the outer surface of modern office glass has a special coating.
The figure below shows a pan used for cooking.
Explain the three labelled features of the pan in terms of how they affect thermal energy transfer.
