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Exercise "Chemistry and the environment", created by val92 (a free exercise to learn English):
Results of the 2 005 people who have taken this test:
Average mark: 58.5 / 100 Share
Latest member with a 100/100 (perfect mark): girly54 / FRANCE, on Wednesday 17 October - 14:03:
"Great !"
They got a perfect mark
Stats (2004 candidates)
Question 1 passed: 69.4 %
Chemistry is a * that is useful in many different industries.
Question 2 passed: 55.8 %
Chemical * is very important for improving human conditions
Question 3 passed: 60.2 %
but most people have a negative image of chemistry because of the * that is generated by this industry.
Question 4 passed: 54.8 %
Fortunately, nowadays, the chemical industry takes better care of the * although it still sometimes pollutes it.
Question 5 passed: 52.6 %
Chemists know that experiments must be done in * for safety reasons because
Question 6 passed: 52.8 %
mixing different chemicals under certain conditions will cause a chemical * to occur.
Question 7 passed: 46.2 %
Some substances can be hazardous to * and cause injury or even cancer.
Question 8 passed: 47.4 %
You must wear * to protect your eyes if you handle chemicals.
Question 9 passed: 57.5 %
Additionally, it's a good idea to put on * to protect your hands.
Question 10 passed: 58.2 %
In some cases, you must wear a * to avoid inhaling dangerous substances.
Question 11 passed: 80 %
In a way, chemistry is like * because you mix and heat various ingredients according to a recipe.
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