Descripción: Headway Intermed Test Booklet Key 4th Edition
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Descripción: american english file 4 test
InglesFull description
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Some thoughts on the development of tafsir
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Renato Constantino's "Veneration Without Understanding" has become a standard work on Jose Rizal's place as a Filipino revolutionary hero and has been unchallenged for decades, until now. Bo…Full description
2 Danny took a can of lemonade out of the fridge and put it on the table. a What happened to the temperature of the the lemonade in the can? _________________________________ ________________ ___________________________________ ____________________________________ ______________________________ ____________ [1 mark]
b Danny left the can of lemonade on the kitchen table. Suggest what temperature the lemonade will be after 2 hours. _________________________________ ________________ ______________________________ _____________
c Ravi took a can of lemonade out out of the fridge, and put it into a foam container. He left the container on the kitchen table. His lemonade le monade stayed cold longer than Danny’s. Give the reason for this.
4 Mary tested three different insulating materials. She wrapped each material around a beaker of hot water and measured the temperature of the water every minute for 10 minutes.
90 85 ) C ° ( 80 e r u t a r 75 e p m70 e T
material A material B
65
material C
60 0
1
2
3
4
5
6
7
8
9
10
Time (minutes)
The graph shows her results. a What was the temperature at the beginning of the experiment?. _________________________________________________________________________________
5 Metals are good conductors of heat. a Each circle in the diagrams below represents a particle of a substance. Put a ring around the diagram which shows the arrangement of particles in a solid. A
B
C
[2 marks]
b Explain how metals conduct heat, using ideas about particles.
6 a The statement below explain how energy is transferred through the water in the kettle. Complete each sentence with the correct letters from the diagram. i The water cools and becomes more dense at
__________. A
ii The cool water sinks to __ where it passes over the heater.
__________. C
B
[1 mark]
D
b Why does the water rise after passing over the heater?
c Heat passes through the sides of the kettle by conduction but not convection. Why does convection not happen in solid materials? ________________________________________________________ Page 3 of 5
End of Unit Test (continued) d Draw the convection current on this diagram. ice cube
[2 marks]
7 This graph shows how the temperature of a pure solid changes as it is heated.
E
) C ° ( D e r u t a r e p m e T B
C
X
A
Time
a Write the correct letter from the graph (A–E) next to each statement. i This is the melting point of the substance. ii Where is the substance a liquid?
__________.
__________.
iii Where is the substance formed from closely parked, regularly arranged particles? __________. iv Where can the substance be squeezed into a smaller volume?
