CHEM 208 Lecture 1: Module 2
31 Jan 2017
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Document Summary
Matter: anything that occupies space and has mass. Observations are not just performed in a scientific setting, also seen in our everyday lives. Scientific is used to express very large and very small numbers by multiply a value by 10 to an exponent. The si system is based on the metric system. Use pre-fixes to move from one unit to another, move the decimal point accordingly. The scientific method (performing a study in organized steps): performing experiments. An experiment is a set of steps (procedures) that are performed under controlled conditions to propose or test a hypothesis: making observations (key factor in scientific studies as well as in everyday life) Ex: the flower is purple, bubbles are produced when you add lemon juice to baking soda. Quantitative observation is a measurement and it has two components. Ex: observed temperature (measured using a thermometer) is 33 degrees celsius: measure quantity is temperature and appropriate unite is degrees celsius.
