Originally trade was by goods exchange. From about 600 BCE they started to use rods of iron (a scarce commodity then) a rod being an 'obol', six making up a handful - a 'drachma'. Then coins of bronze, silver and then gold of various weights were progressively developed at weights and values according to the city where they were minted. The names obol and drachma were used for the coins.
Same way we do. Money.
Yes. They used drachmas.
The ancient Greeks understood magnets but since they did not have a source of electricity, they did not use electromagnets. They did make compasses.
What did the ancient Greeks use cereal for?Note: Past tense, 't' is quite far from 'd'
Yes.
olives
yes
olives
Battle
The ancient Greeks would use the water for bathing, and beverage. I'm not quite sure about the current Greeks though. If I find out I'll let you know ASAP
The Ancient Greeks did not use the scientific method, it was not invented until modern times.
they go in the trees?