How does a steam engine work?
- AFrom water
- BFrom heat
- CFrom sound
- DFrom oil
Show answer and explanation
Correct answer: (b) From heat
Explanation
A steam engine is a heat engine: heat from burning coal or wood turns water into steam, and the pressure of the steam drives a piston, turning heat into mechanical work.
James Watt's improvements (1769) made it practical and powered the Industrial Revolution.