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Heat
Revision of Heat chapter
Question | Answer |
---|---|
What unit is heat measured in? | Joules |
What happens solids, liquids and gases as you heat them? | They expand |
What happens solids, liquids and gases as you cool them? | They contract |
How does heat travel through a liquid? | Convection |
How does heat travel through a solid? | Conduction |
How does heat travel through the air or a vacuum? | Radiation |
Which surface radiates heat better...black or white? | Black |
Name the equipment used to show that solids expand when they're heated and contract when cooled. | Ball and ring |
List the following metals in order of how well they conduct heat: brass, aluminium, iron copper | Aluminium, Copper, Brass, Iron |
What do you call substances that do not allow heat to travel through them easily? | Insulators |
What happens to the boiling point of water if you increase the pressure? | It increases |
Give an application of the fact that the boiling point of water increases with increased pressure. | A pressure cooker |
What is the boiling point of water? | 100 degrees celsius |
What do you call the extra heat taken in, or given out, during a change of state? | Latent Heat |
List some methods of reducing heat loss from your house. | Double Glazed Windows, Draught excluders, Attic insulation, Cavity Wall Insulation |
Name the two liquids commonly used in thermometers. | Alcohol and Mercury |
What happens to the boiling point of water if you reduce the pressure? | It decreases |