1) Thomas Alva Edison was a great scientist. He ____________ the light bulb in 1879 and patented on January 27,1880.  a) discovered b) invented c) received d) informed 2) Aziz Sancar is a Turkish molecular biologist. He got the Nobel __________in Chemistry,in 2015. a) cure b) prize c) cell d) sample 3) Choose the correct answer. a) x-ray b) vaccinate c) conduct an experiment d) heat the test tube 4) _____ people are either blind or have a very poor vision. a) Mental capacity b) With the help of c) Sight-disabled d) Wheel chair bound 5) Doctors always do researches and experiments to _________ diseases like cancer or ALS. a) promote b) develop c) move d) cure

9th unit science

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