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Monday, September 28, 2020

Reading and writing fill in the blanks practice exercise. Below is text with blanks. Choose the correct word for each blank to complete the text.

Bullet-proof materials that cops wear today work by spreading out force of a bullet’s impact. But it can  cause bruises or even severe damage to internal organs. Now researchers at the University of Sydney are using nanotechnology to develop a vest that conjures up images of (1) …………………..—the bullets bounce away (2) ………………….. . The researchers worked on the nanometer scale—one billionth of a meter—with carbon (3) …………………………. .  A carbon nanotube is an atom (4) ………………………….. of graphite, like in pencil lead. They’re (5) ………………………….., extremely strong, and can absorb a great deal of energy.  But how to optimize these properties to make a bulletproof vest? The researchers tested how nanotubes of different sizes responded to the impacts.  In place of bullets, they used tiny and  super-hard diamonds.  Ironically, diamonds are just another (6) ………………………. of carbon atoms. Larger nanotubes worked best at deflecting the diamond (7) …………………….. The nanotubes also quickly snapped back into position to deflect a second bullet that might hit the same spot. The study, published in  journal Nanotechnology, paves the way for a super-thin bulletproof vest of the future.

(1) Putamen, Fueron, Lunation, Superman,
(2) microscopy, apathy, harmlessly, monarchy
(3) occludes, nanotubes, latitudes, news
(4) thick-cylinder, cryptographer, invigilator, devastator
(5) blamed, overestimate, lightweight, deviate
(6) edutainment, halest, arrangement, jaded
(7) scriptures, adventures, princes, projectiles

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