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5
………………,
but to reduce the cost of 
6 ………….
and to bring more profit out of it. In the 
end, such selfish use of precautionary principle for business and political gain has often led people to 
7……………..
science for they believe scientists are not to be trusted. 

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Welcome to Mr Aslanov’s Lessons 
QUESTION-TYPE BASED TESTS 
FunEnglishwithme [phone] 
 
TEST 3 – The Lost City 
Thanks to modern remote-sensing techniques, a ruined city in Turkey is slowly revealing itself as one 
of the greatest and most mysterious cities of the ancient world. Sally Palmer uncovers more. 
 
A.
The low granite mountain, known as Kerkenes Dag, juts from the northern edge of the 
Cappadocian plain in Turkey. Sprawled over the mountainside are the ruins of an enormous city, contained 
by crumbling defensive walls seven kilometers long. Many respected archaeologists believe these are the 
remains of the fabled city of Pteria, the sixth-century BC stronghold of the Medes that the Greek historian 
Herodotus described in his famous work 
The Histories. 
The short-lived city came under Median control and 
only fifty years later was sacked, burned and its strong stone walls destroyed. 
B. 
British archaeologist Dr Geoffrey Summers has spent ten years studying the site. Excavating the 
ruins is a challenge because of the vast area they cover. The 7 km perimeter walls run around a site covering 
271 hectares. Dr Summers quickly realised it would take far too long to excavate the site using traditional 
techniques alone. So he decided to use modern technology as well to map the entire site, both above and 
beneath the surface, to locate the most interesting areas and priorities to start digging. 
C. 
In 1993, Dr Summers hired a special hand-held balloon with a remote-controlled camera attached. 
He walked over the entire site holding the balloon and taking photos. Then one afternoon, he rented a hot-air 
balloon and floated over the site, taking yet more pictures. By the end of the 1994 season, Dr Summers and 
his team had a jigsaw of aerial photographs of the whole site. The next stage was to use remote sensing, 
which would let them work out what lay below the intriguing outlines and ruined walls. "Archaeology is a 
discipline that lends itself very well to remote sensing because it revolves around space," says Scott 
Branting, an associated director of the project. He started working with Dr Summers in 1995. 
D.
The project used two main remote-sensing techniques. The first is magnetometry, which works on 
the principle that magnetic fields at the surface of the Earth are influenced by what is buried beneath. It 
measures localised variations in the direction and intensity of this magnetic field. "The Earth s magnetic 
field can vary from place to place, depending on what happened there in the past says Brantmg. "If 
something containing iron oxide was heavily burnt, by natural or human actions, the iron particles in it can 
be permanently reoriented, like a compass needle, to align with the Earth's magnetic field present at that 
point in time and space." The magnetometer detects differences in the orientations and intensities of these 
iron particles from the present-day magnetic field and uses them to produce an image of what lies below 
ground. 
E.
Kerkenes Dag lends itself particularly well to magnetometry because it was all burnt once in a 
savage fire. In places the heat was sufficient to turn sandstone to glass and to melt granite. The fire was so 
hot that there were strong magnetic signatures set to the Earth's magnetic field from the time - around 547 
BC - resulting in extremely clear pictures. Furthermore, the city was never rebuilt. "If you have multiple 
layers, it can confuse pictures, because you have different walls from different periods giving signatures that 
all go in different directions," says Branting. "We only have one going down about 1.5 meters, so we can get 
a good picture of this fairly short-lived city." 
F.
The other main sub-surface mapping technique, which is still being used at the site, is resistivity. 
This technique measures the way electrical pulses are conducted through subsurface soil. It's done by 
shooting pulses into the ground through a thin metal probe. Different materials have different electrical 
conductivity. For example, stone and mudbrick are poor conductors, but looser, damp soil conducts very 
well. By walking around the site and taking about four readings per metre, it is possible to get a detailed idea 

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