A thermometer is used to find the temperature inside a room in a house.
(a)[1]
State a physical property that changes with temperature and can be used in a thermometer.
(b(i))[1]
Suggest the time when the heater was switched off.
(b(ii))[2]
Suggest the time when the curtains were closed and explain your answer using information from the graph.
(c)[3]
Use words from the box to complete the sentences. Air is a good ........ . When air is trapped between fibres, it reduces heat loss by ........ and by ........ .
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Any one of: expansion / voltage / potential difference / emf / length / colour / pressure / volume / resistance / density” …