Who invented the telephone?
Which device is used to measure atmospheric pressure?
What kind of lens is used in a magnifying glass?
What is the hardest natural substance on Earth?
Which scientist developed the first successful polio vaccine?
Who invented the light bulb?
Which of the following are ways to produce electricity?
Which of the following are common tools used in scientific experiments?
Who invented the Microscope?
Which device is used to measure temperature?
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