History of Chemistry Worksheet
Explore the fascinating history of chemistry, from ancient alchemy to modern atomic theory, with this engaging worksheet for Grade 9 science students.
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History of Chemistry
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Read each question carefully and answer to the best of your ability. Show all your work where applicable. This worksheet covers key milestones and figures in the history of chemistry.
1. Which ancient practice is often considered a precursor to modern chemistry, focusing on transforming base metals into gold and seeking the elixir of life?
Astronomy
Alchemy
Biology
Geology
2. Who is credited with developing the first modern atomic theory, proposing that matter is composed of indivisible atoms?
Antoine Lavoisier
Dmitri Mendeleev
John Dalton
Marie Curie
3. The Law of Conservation of Mass was formulated by , stating that mass in an isolated system is neither created nor destroyed.
4. Dmitri Mendeleev organized the elements based on their atomic mass and recurring properties, creating the first version of the .
5. Briefly explain the significance of the discovery of the electron by J.J. Thomson in the development of atomic theory.
Match each scientist with their major contribution to chemistry.
6. Robert Boyle
a. Discovered radioactivity
7. Marie Curie
b. Proposed the plum pudding model of the atom
8. J.J. Thomson
c. Defined an element and distinguished mixtures from compounds
9. Ernest Rutherford
d. Discovered the atomic nucleus through the gold foil experiment
10. The phlogiston theory accurately described combustion as the release of a fire-like element.
True
False