Please enable JavaScript.
Coggle requires JavaScript to display documents.
timeline project - Coggle Diagram
timeline project
links
-
k.mah, "UnitB: Matter and chemical change in science in action 9 Toronto, ON, Canada: Pearson Ed./Addison Wesley 2002 pp. 102-120 [1]
-
-
-
-
-
-
-
-
-
-
-
-
start 8000 bc
stone age chemistrry
One of the tools they used in the early Stone Age was the hammer stone used for hunting. we also have the core used to extract meat and bone marrow from large animals with its sharp edges made by removing flakes from the stone. then there is the hand axe that was used to butcher animals and dig in the ground.
one of the tools used in the Middle Stone Age was the projectile point used on spears and darts to hit fast-moving pray. and the bone awls were used to make clothing.
in the later Stone Age, the burin was used to create designs on the surfaces of certain materials like wood. and the bone needle helped sew clothes to make good-fitting clothing. and the harpoon point is used for fishing. [2]
democrittus
His discovery is that all different materials is made of different types of particles these different particles are what make these substances different and the properties of the particles also determine the material [10]
aristotle
his achievement is inventing the scientific method of analysis which is making an observation of the thing you are working on, making a hypothesis on what will happen to the experiment, and then analyzing the results [5]
alchemists
They are people who will try to find ways to make a substance into a different substance through transmutation or some other kind of change to make a better and more helpful material [11]
al-razi
A ache my of his is that he was the one who portrayed smallpox and to make it different then the disease measles he wrote a thesis on the subject called “Kitab al Judari wa al Hasbah” [7]
Andreas libau
His discoveries are the methods of preparation for the following substitutes these substances are ammonium sulphate, antimony sulphide, hydrochloric acid, and tin tetrachloride these are the substances he had found methods to prepare [8]
Robert boyle
He discovered that the amount of gas decreased when there was an increase of pressure and the other way around because when pressure is applied to a gas it will become more compressed because of a lack of space and the other way around because gas is so spread out [12]
John dalton
He suggested that all matter no matter what it is comprises atoms which are indestructible and that the different properties and masses make up what different matter is [14]
-
j.j. thomson
One of his achievements is interpreting the deflection of the rays by electrically charged plates and magnets as evidence. This is evidence that there are bodies smaller than atoms, which are electrons and have a significant charge to mass volume. [3]
hantaro nagaoka
He proposed a small nucleus surrounded by a ring of electrons is what the atom was comprised of and this was the first modal to have a nucleus [13]
Neil's bohr
His contribution is that the electrons in an atom move in a fixed orbit and not in any other place that it is all in the same place [9]
Ernest rutherford
some of his achievements are discovering alpha and beta rays and what they are setting the laws of reductive decay where an unstable atomic nucleus loses energy by radiation, and identifying alpha particles as helium nuclei [6]