OCR STAGED ASSESSMENT

1
OCR STAGED ASSESSMENT

• Module PD2 Practice Questions

2
Ellie gets four things from her kitchen. They are
all at different temperatures.   (a) (i) Whi
ch is the hottest? Choose from iced
drink ice lolly hot chocolate boiling
water   Answer ..
1 (ii) Which is the
coldest? Choose from iced drink ice
lolly hot chocolate boiling water   Answer
.. 1   (b) Ellie
puts these four things in a warm room. The
temperature of the room is 20oC.   (i) Which
two things will get hotter? Choose from
iced drink ice lolly hot
chocolate boiling water   ..
and .1   (ii) Which two will
get cooler? Choose from iced drink ice
lolly hot chocolate boiling
water   .. and
.1
3

                   Steve has insulated parts of
his house. His heating bills are lower. Look at
the diagram.        (a) Calculate the cost of
Steves heating bill.  
...   Answer
1   (b) Steves double
glazing has an air gap between the two pieces of
glass. Why is air important for this way of
saving energy?  
.. 1 (c) Steve put double glazing
in his house to reduce his heating bills.
Write about some other ways he could insulate
his house.   3   (d) It cost Steve
10 000 to fit double glazing. The double
glazing cost saves 50 each year in energy
costs.   Calculate the pay back time for
fitting double glazing. 1    
4
 
                         (a) Don puts a pan of
milk on the cooker         The pan is made
of metal. Energy is transferred by conduction
through the bottom of the pan to the
milk. Explain how. Use ideas about particles in
your answer. 3     (b) Don leaves the pan
of hot milk on a table. What will happen to the
temperature of the milk? 1 (c)       
   Don cooks jacket potatoes in the oven. He
takes them out of the oven and wraps them in
shiny aluminium foil.   The foil keeps them
hot for a long time. Explain how. 2