Difficulty: Easy
Correct Answer: Thermometer/thermoscope (precursor to the modern thermometer)
Explanation:
Context
Clarification
Galileo created a thermoscope (early 1600s), a temperature-indicating device regarded as a precursor to the thermometer. He did not invent the barometer (Torricelli), nor the microscope as first originator, and certainly not the steam engine.
Final Answer
Thermometer/thermoscope (precursor to the modern thermometer).
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