Heat What do dark, matt surface do to radiation? Hot to cold What happens to particles when they gain more energy? Temperature What is another name for thermal energy? Conduction What direction does heat travel? C What is a measurement of how hot or cold a substance is? Solids What method of heat transfer involves particles knocking their neighbours to pass on energy? Thermometer What unit do we use to measure temperature? Metals What state does conduction happen most in? Melting What equipment to we use to measure temperature? Insulators What materials are very good conductors of heat? Evaporating What do we call the process of changing state from Solid to liquid? Fluids What do we call material which do not conduct heat Condensing What do we call the process of changing state from liquid to gas? Convection What do we call states in which the particles can move. ie liquids and gases? It turns from a liquid to a solid What do we call the process of changing state from gas to liquid? It expands What method of heat transfer involves hot fluids rising and sinking? They have lost energy What happens when a substance freezes? It decreases What happens to an object when it is heated? Boiling point What happens to the particles when a substance cools down? The particles cannot move What happens to the density of a substance when it expands? 100oC What do we call the temperature at which water will all turn gas? Radiation What can conduction not happen in solids? Horizontal line What is the boiling point of water? Heat reaches up from the sun What type of heat transfers does not require particles? They vibrate more What will we see of a temperature-time graph when a substance is changing state? Reflect it How do we know that radiation can travel through a vacuum? Absorb it What do shiny surfaces do to radiation? o