Questions 27-33
Write the correct letter, A–O, in boxes 27-33 on your answer sheet.
For more than 2000 years people have wondered why raising the
page 11
Access https://ieltsonlinetests.com for more practices
27
of cold water before cooling it results in more rapid cooling. At
first researchers thought that a warm container created its own icy
28
which made the water freeze faster, but comparisons with
containers resting on a dry 29
indicated that this was inaccurate.
Evaporation of water proved not to be a 30
.
Temperature measurements showed that, although the water in the cooler container
reached 00C before the warmer one, it took longer to actually solidify. The water
temperature drops the most at the top and sides of the container. Provided there is
a temperature 31
, the water will continue to circulate and to cool
down. Cooler water will have less wate 32
, and thus a slower rate
of freezing. If ice forms on the top of the water, this will further slow the
33
of freezing, but if it forms on the bottom and the sides of the
container, this will increase the rate of cooling.
A
melt
B
element
C
process
D
centre
E
acceleration
F
surface
G
factor
H
hollow
I
matter
J
circulation
K
limit
L
significance
M
theory
N
difference
O
result
P
temperature
page 12
Access https://ieltsonlinetests.com for more practices
Questions 34-39
Dostları ilə paylaş: |
