Answer:
1. Water Mill - revolutionary invention, used across the world mainly for agriculture
2. The Odometer - most widely used instrument, measures the distance traveled by a vehicle (like a bicycle)
3. Alarm Clock - Plato (ancient greek philosopher) used it at night to signal the beginning of his lectures at dawn
4. Cartography - study and practice of making maps, played an important role in travel and navigation
5. Olympics - first ancient Olympics were dated all the way back to 776 BC.
6. Basis of geometry - demanded the use of various geometric techniques. Egyptions, Babylonians, and Indus were among the first to use the techniques.
7. Early Practice of Medicine - Hippocrates (known as father of medicine) collected data and conducted experiments to show diseases were natural and that symptoms were caused by natural reactions of the body.
8. Modern Philosophy - They developed philosophy to understand the world around them without thinking about religion, myths, or witches/magic.
9. Concept of democracy - Athens is regarded as the birthplace of democracy. They had the idea that all people should have equal opportunities and a say in government, just like how it is in modern days.
10. Discoveries in Modern Science - Aristole introduced the idea of the Earth as a globe and classified animals, known as the father of zoology. Theophrastus is the first botanist that we know of. Pythagoreans introduced the idea of the Earth revolving around the Sun, not the Sun revolving around the Earth. Archimedes discovered that submerging a solid object under water will displace the amount of liquid as the object's weight.