Branches of Chemistry
This branch studies substances containing carbon.
What is Organic Chemistry?
A tentative explanation or educated guess that can be tested.
What is a Hypothesis?
He proposed water as the single element around 600 B.C.
Who is Thales?
Why is chemistry is called the “central science.”
What is because it overlaps and connects with many other sciences?
“If a metal rod is placed in sunlight, then it will become hotter than one kept in the shade.”
What is a Hypothesis?
This branch studies substances derived from living organisms and biological processes.
What is Biochemistry?
A statement describing a consistent relationship observed in nature, considered universally true under specific conditions.
What is a Natural Law?
He identified four elements (air, fire, water, earth) from observing burning wood.
Who is Empedocles?
This chemist was executed by guillotine on May 8, 1794 during the Reign of Terror in the French Revolution.
Who is Antoine Lavoisier?
“At constant temperature, the pressure of a gas is inversely proportional to its volume.”
What is a Law?
This branch determines what substances are present in a sample and measures how much.
What is Analytical Chemistry?
A well-supported explanation of natural phenomena tested repeatedly through experiments.
What is a Scientific Theory?
He added a fifth element, quintessence, thought to fill the universe beyond Earth.
Who is Aristotle?
This type of chemistry protects the environment by reducing hazardous waste.
What is Green Chemistry?
“Ice floats because hydrogen bonds in frozen water form a crystalline structure less dense than liquid water.”
What is a Theory?
This branch studies all substances that do not contain carbon.
What is Inorganic Chemistry?
The science that studies matter, its properties, and how it changes.
What is Chemistry?
He is considered the founder of modern chemistry.
Who is Antoine Lavoisier?
This explains why metals expand when heated—atoms vibrate more vigorously and push farther apart. (Key word: Because)
What is a Theory?
“An object in motion stays in motion unless acted upon by an outside force.”
What is a Law?
This branch designs products and processes that reduce hazardous substances.
What is Green Chemistry?
This branch uses mathematics and models to explain chemical behaviour.
What is Physical Chemistry?
Early practitioners who sought the philosopher’s stone and believed metals could be changed into gold.
Who were the Alchemists?
“If sugar is dissolved in hot water, then it will dissolve faster than in cold water.”
What is a Hypothesis?
“If students get at least eight hours of sleep before a test, then they will score higher.”
What is a Hypothesis?