1) People do ................ to learn about the physical world or to test theories. a) Vaccines b) Experiments c) Diagnose 2) A ................. always points north a) Electricity b) Tyre c) Compass 3) a kind of mold that is used to make medicines. a) Penicillin b) Compass c) Catgut 4) On Earth, objects fall to the ground because of ......... a) Gravity b) Electricity c) Science 5) Thin, strong string made from animals’ intestines and used in surgeries a) Penicillin b) Catgut c) Vaccine 6) A machine that produces printed copies a) Windshield wiper b) Steam engine c) Printing Press 7) ............ have saved the lives of millions of people since they were invented. a) Vaccines b) Gravity c) Space 8) To find or see before anyone else. a) Invent b) Experiment c) Discover  9) A chemical element used in the treatment of diseases such as cancer. a) Radium b) Smallpox c) Microbe 10) Many devices are powered by ............, including lights, TVs, radios and computers a) Gravity b) Device c) Electricity 11) A strong, light, silver metal that does not easily rust. a) Vaccine b) Aluminum c) Molecules 12) To produce or design something that has not existed before a) Discover b) Invent c) Conduct

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