Word Pairs


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The words
A [team / teem] of engineers has created a super-thin material that could help [keep / stay] buildings cool. The team is from the University of Colorado Boulder in the USA. Engineers from the university [development / developed] the revolutionary new material, that is very thin and can [cooling / cool] objects even under [directly / direct] sunlight. The material does not need energy [to / for] work nor does it need water to help keep [things / thing] cool. The engineers say the new material could provide an [answer / solution] to air conditioners, which are expensive to run and [need / needs] a lot of water. The material is unlike anything found in nature. It is a glass-polymer hybrid that is just 50 micrometers thick. That's slightly [thicken / thicker] than the aluminum foil we use for cooking.

The engineers explained how their new material [works / work] . They said when it is put on top of something, two things [happening / happen] . The first thing is that it cools the object underneath [as / by] reflecting the sun's rays back [onto / into] space. At the same time, the [second / secondly] thing happens - the material removes the object's own heat and sends that into the air. An engineer said: "The [lock / key] advantage of this technology is that it works 24/7 with [no / not] electricity or water usage….We're excited about the opportunity [to / for] explore potential uses in the power industry, aerospace, agriculture and more." Another researcher said: "Just 10 to 20 square [meter / meters] of this material on the rooftop could nicely cool [down / up] a…house in summer."

Back to the air conditioning lesson.

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