Hotter weather leads to lower exam results, according to a new study from Harvard University. What’s     1     (many), hot weather may reduce learning in both the short term and long term. Researchers reported that hot weather on test days higher than average temperatures throughout the school year resulted in poorer grades.     2     study is the first major research into the effect of heat     3     students in the USA. Researchers analyzed how test scores from 10 million American students     4     (affect) by the weather. Their findings showed that an average temperature increase of just 0.55℃ over one year resulted in a one per cent decrease in     5     (learn).

The research is in a paper     6     (call) “Heat and Learning” and was published last month by the USA’s National Bureau of Economic Research. One of the more concerning     7     (conclude) contained in the study is that     8     (globe) warming may affect learning and the income-earning potential of students around the world. The researchers predicted     9     if temperatures continued to rise, the average American student could lose $25,000 in income over     10     (they) lifetime because of lower exam results. Using air conditioning in classrooms could avoid this.