Soal Latihan dan Jawaban Reading Comprehension 64
The most easily recognizable meteorites are the iron variety, although they only
represent about 5 percent of all meteorite falls. They are composed of iron and nickel
along with sulfur, carbon, and traces of other elements. Their composition is thought to
be similar to that of Earth’s iron core, and indeed they might have once made up the
(5) core of a large planetoid that disintegrated long ago. Due to their dense structure, iron
meteorites have the best chance of surviving an impact, and most are found by farmers
plowing their fields.
One of the best hunting grounds for meteorites is on the glaciers of Antarctica,
where the dark stones stand out in stark contrast to the white snow and ice. When
(10) meteorites fall on the continent, they are embedded in the moving ice sheets. At places
where the glaciers move upward against mountain ranges, meteorites are left exposed
on the surface. Some of the meteorites that have landed in Antarctica are believed to
have come from the Moon and even as far away as Mars, when large impacts blasted
out chunks of material and hurled them toward Earth.
(15) Perhaps the world’s largest source of meteorites is the Nullarbor Plain, an area of
limestone that stretches for 400 miles along the southern coast of Western and South
Australia. The pale, smooth desert plain provides a perfect backdrop for spotting
meteorites, which are usually dark brown of black. Since very little erosion takes place,
the meteorites are well preserved and are found just where they landed. Over 1,000
(20) fragments from 150 meteorites that fell during the last 20,000 years have been
recovered. One large iron meteorite, called the Mundrabilla meteorite, weighed more
than 11 tons.
Stony meteorites, called chondrites, are the most common type and make up more than
90 percent of all falls. But because they are similar to Earth materials and therefore
(25) erode easily, they are often difficult to find. Among the most ancient bodies in the solar
system are the carbonaceous chondrites that also contain carbon compounds that might
have been the precursors of life on Earth.
Reading Comprehension 64
How the composition of meteorites is similar to that of Earth
Why most meteorites do not survive impact with Earth
The origins of meteorites
Finding meteorites on Earth's surface
meteorites are found most often in Antarctica
most of Antarctica is covered with meteorites
meteorites are easier to find in glacial areas
glaciers stop meteorites from mixing with soil
The size of the fragments
On a mountain
On the Nullarbor Plain
In a field
They are the largest meteorites found on Earth
They are most likely to be found whole.
They come from outside the solar system.
They may be related to the origins of life on Earth.
less likely to be discovered than iron meteorites
composed of fragmented materials
mostly lost in space
found only on the Nubblarbor Plain