WorksheetsMoments Topic Retrieval 5
Total questions: 10
Worksheet time: 7mins
Which of the following would reduce the dissipation of energy from a house to the surroundings?
insulation
large walls
thin walls
metal walls
What is an insulator?
Something that keeps objects warm
Something that stores thermal energy
Something that slows the transfer of thermal energy
Something that allows the transfer of thermal energy
Calculate the payback time for double glazed windows that cost £1800 to install and save £150 on heating bills
14.4 months
22.5 years
0.083 years
12 years
Double glazing works by...
Setting up a convection current in the gap between the windows that stops thermal energy transfer
A layer of foam between two window panes traps air and stops conduction and convection
Thick layers of glass ensure that conduction takes longer so it slows the rate of thermal energy transfer
A trapped layer of air between two window panes stops conduction and convection
What is the independent variable
Anything that can change
The thing you change
The thing you measure at the end
The thing you keep the same
What is the dependent variable
Anything that can change
The thing you change
The thing you measure at the end
The thing you keep the same
What does this define: To find the _______, add all the numbers together then divide by the number of numbers.
median
mode
range
mean
