Metals were not discovered, stone tools were used.
Fire is started being controlled by people.
Learnt to product steel.
Sharper and harder tools for hunting.
Theory everything was Air, Water, Earth, Fire
Philosopher, Aristotle believed and created this theory
People had a greater interest in understanding the nature of matter and change than the alchemists had.
People investigating the world around them became more like scientists today
Robert Boyle experimented with the behaviour of gases.
Robert Boyle was convinced that matter was made up of tiny particles.
Antoine Laurent Lavoisier had developed a system for naming chemicals.
Using his naming system, Lavoisier defined some of the substances discovered to that time, including hydrogen, oxygen, and carbon
Thomson experimenting with cathode rays, concluded that the rays were made up of streams of negatively charged particles.
He showed that these particles were much smaller in mass than even a hydrogen atom.
John Dalton suggested that matter was made up of elements.
He stated that each element is composed of a particle called an atom.
Thomson described the atom as a positively charged sphere in which negatively charged electrons were embedded like raisins in a bun.
The negative electrons balance the positive sphere, so the whole atom has no electrical charge
Rutherford suggested that atoms were mainly empty space through which the positive particles could pass, but at the core was a tiny positively charged centre.
This he called the nucleus.
Bohr's theory was that the electrons in the atoms do not just move randomly . They just jumped between shells gaining or loosing their energy.
Through Bohr's work Chadwick discovered that the nucleus contained positively charged particles called protons, and neutral particles called neutrons.
The current time that we live in.