Radiation P1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are the three methods of heat transfer? | • Conduction
• Convection
• Radiation
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| What are the main transfer methods through: a) Solids b) Liquids and gases? | a) Conduction
b) Convection
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| What is the link between temperature difference and rate of energy transfer? | The bigger the temperature difference between and object and its surroundings the faster the rate of transfer of heat energy
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| What happens to the rate of transfer if an object is: a) Hotter than its surroundings b) Cooler than its surroundings? | a) The faster the rate of transfer of heat energy
b) The slower the rate of transfer of heat energy
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| Why? | Because if an object is hotter, it radiates more radiation than if its cooler.
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| Why is matt black a good colour to use for some appliances? | Because it absorbs and emits radiation better than shiny surfaces
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| What is a use of matt black surfaces? Explain why. | Solar hot water panels with water pipes on a black surface absorb radiation to heat water in pipes, then pumped around the radiators etc.
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| Why are silver, shiny surfaces useful in some appliances? | Because they reflect the radiation falling on them
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| Give a use of shiny surfaces and explain why its useful. | Vacuum flasks have silver shiny surfaces on the inside of them to keep heat in or out depending whether they are holding hot or cold water
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
GuyBrazier
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