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Homework:. Read Chapter 1(pages 2-3) in the textbook and answer the questions on worksheet 1: Matter and Change You may also use the PowerPoint presentation to help you Quiz scheduled October 1 st and 2 nd Test scheduled for Oct 29 / 30. Introduction to Chemistry. Unit 1. CHEMISTRY:.
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Homework: • Read Chapter 1(pages 2-3) in the textbook and answer the questions on worksheet 1: Matter and Change • You may also use the PowerPoint presentation to help you • Quiz scheduled October 1st and 2nd • Test scheduled for Oct 29 / 30
Introduction to Chemistry Unit 1
CHEMISTRY: • The study of the composition of matter • Matter: anything that has mass and takes up space • Biochemistry: Study of living organisms • Organic: Study of all carbon containing substances
CHEMISTRY: • Inorganic: Study of substances that don’t contain carbon. • Physical: Chemistry that uses theories and experiments to describe the behavior of chemicals. • Analytical: Study of the composition of substances.
Scientific Method • Logical approach to the solution of scientific procedures
OBSERVATION • Used senses to obtain information directly HYPOTHESIS • Educated guess as to what you have observed
EXPERIMENT • The means to test a hypothesis THEORY • Broad and extensively tested explanation of why experiments give certain results
SCIENTIFIC METHOD Observation Experiments Hypothesis THEORY
THEORIES • Can never be proven • May be disproved by another experiment • Can predict the behavior of a natural system • Explains WHY substances behave the way that they do.
SCIENTIFIC LAW • Concise state that summarizes the results of many observations and experiments • Explains what not why • Can be expressed as a mathematical relationship
Matter versus Energy • Matter: space and takes up mass (volume and mass) • Energy is a force that acts upon matter
Weight versus Mass • Mass will not change with location • Weight: force or pull on matter by gravity • Energy is not considered matter. • Energy has no mass and does not take up space. • Energy is a force that acts upon matter.