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- Introduction to Chemistry
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2
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- Most other sciences demand an understanding of basic chemical
principles, and Chemistry is often referred to as the
Central Science
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3
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- The Greeks believed in four basic elements, Earth, Air, Fire, and Water
- All substances were combinations of these four basic elements
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4
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- Science is the methodical exploration of nature followed by a logical
explanation of the observations.
- Scientific investigation entails:
- planning an investigation
- carefully recording observations
- gathering data
- analyzing the results
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5
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- The scientific method is a systematic investigation of nature and
requires proposing an explanation for the results of an experiment in
the form of a general principle.
- The initial, tentative proposal of a scientific principle is called a hypothesis.
- After further investigation, the original hypothesis my rejected,
revised, or elevated to the status of a scientific principle.
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- After sufficient evidence, a hypothesis becomes a scientific theory.
- A natural law is a measurable relationship.
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7
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- Chemistry is a science that studies the composition of matter and its
properties.
- Chemistry is divided into several branches:
- Organic chemistry is the study of substances containing carbon
- Inorganic chemistry is the study of all other substances that don’t
contain carbon
- Biochemistry is the study of substances derived from plants and animals
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8
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- Different people learn chemistry differently.
- What do you see in the picture?
- Some people see a vase on a dark background, some people see two faces.
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9
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- Connect the 9 dots using only four straight lines.
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10
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- Are we confining the problem?
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- Scientists use the scientific method to investigate the world around
them.
- Experiments lead to a hypothesis, which may lead to a scientific theory
or a natural law.
- Chemistry is a central science with many branches.
- The impact of chemistry is felt in many aspects of our daily lives.
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