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Huge 30 tonne meteorite dug up in Argentina
The second-heaviest meteorite ever found fell to earth 4,000 years ago (CCSS Level: Grade 6, Words: 298)
Sep 22, 2016 Science & Technology
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A giant 30 ton meteorite has just been dug up in Argentina and it is the second heaviest ever to be found. The huge meteorite was found this week, buried in the little town of Gancedo. The town is just over 1,000km north of Argentina's capital, Buenos Aires.

It comes from a meteor shower that happened in the area around 4,000 years ago. The only larger meteorite to be found is called the Hoba meteorite, which was found in Namibia in Africa. The Hoba rock weighs 66 tons.

Scientists found the space rock on September 10. Although the weight of 30 tons is probably close, the real weight has not been finally measured yet. Also we do not know how wide or high it is, but the scientists were surprised and excited to find such a heavy meteorite.

4,000 years ago, a shower of meteorites fell on the region of Campo del Cielo, where Gancedo is located. The original asteroid was made of pure iron and scientists think it probably weighed as much as 800 tons. Like most asteroids it almost certainly came from the Main Asteroid Belt which lies between Mars and Jupiter.

When this huge meteorite hit the Earth's atmosphere it broke up into many smaller meteorites that spread out over an area covering about 320 square kilometres.

Large rocks like this one don't hit the Earth very often, but thousands of tiny pieces of space rock do hit the ground each year. Of course most land in the sea or forest areas.

Most meteors burn up in the atmosphere, which can sometimes be seen as a bright streak across the night sky. However, when meteors don't get burnt up in their long fall to Earth and drop to the ground, they are called meteorites.

The actual weight of the meteorite has not been finally measured yet. This means 30 tons is...
a calculation
a measurement
an estimate
a feeling
What would a person at Gancedo 4,000 years ago, probably have seen in the sky
many bright streaks in the sky
an 800 ton asteroid flying past
nothing at all would have been seen
explosions like fireworks
The asteroid at Gancedo probably came from where?
The planet Mars
The Main Asteroid Belt
The planet Jupiter
A comet in a sun orbit
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as-te-roid

a small rocky body going around the sun


n.小行星

as-ter-oids

a small rocky body orbiting the sun


n.小行星

at-mos-phere

the gas around the earth or a planet; the mood or feeling of a place


n.大气层/气氛

bu-ried  

put under the earth 


v.隐藏

ca-pi-tal

a city where the government of a country or region sits


n.首都

fin-nal-ly

in the end


adv.最后

lar-ger

bigger


adj.较大

lo-ca-ted

find the place where something is


v.位于

me-te-o-rite

a piece of rock from outer space that hits the Earth


n.陨石

o-ri-gi-nal

the first


adj.原始/原版的

re-gion

an area


n.地区

sci-en-tists

experts in science, people who study science


n.科学家

ste-roids

drugs that may make people bigger, better or faster

 


n.类固醇

sur-prised

feeling or showing surprise


adj.惊讶

weight

how heavy something is


n.重量