Chapters 1. Introduction To Chemistry. CHAPTER OUTLINE. WHAT IS CHEMISTRY?. Materials of the universe can be of several forms:. Chemistry is the science that deals with the materials of the universe, and the changes they undergo. Gas:. air, oxygen. Liquid:.
water, gasoline, vinegar, orange juice
rock, charcoal, table salt, sugar, wood
charcoal + oxygen carbon dioxide
Gasoline + oxygen carbon dioxide + water
glucose ethyl alcohol +carbon dioxide
Ethyl alcohol + oxygen acetic acid
Observations concurred by many.
Facts that our ideas must explain
Scientific guess or proposal that explains observations
Conceptual assumptions that explain data from experiments.
Procedure to test hypothesis. Measures one variable at a time
Predicts related phenomena
Theory modified if additional experiments do not support it
Hypothesis is changed if experiments do not support it.