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Chapter 1
The Chemical World

01-00-03c
Title
Carbon dioxide molecule
Caption
Spacefilling model of a carbon dioxide molecule. Note the linear arrangement of the atoms: The atoms' arrangement has a major effect on the properties.
Notes
Contrasting the linear shape of carbon dioxide with the bent shape of water opens up discussion of the relationship between structure and properties, including such readily observable properties as boiling point and solubility.
Keywords
carbon, oxygen, molecule, model, covalent, nonpolar, greenhouse gas
01-00-04d
Title
Water molecule
Caption
Spacefilling model of a water molecule. Note the bent, or v-shaped arrangement of the atoms: The atoms' arrangement has a major effect on the properties.
Notes
Contrasting the bent shape of water with the linear shape of carbon dioxide opens up discussion of the relationship between structure and properties, including such readily observable properties as boiling point and solubility.
Keywords
hydrogen, oxygen, molecule, model, covalent, polar, solvent
01-02
Title
The scientific method
Caption
The flowchart outlines the steps employed in the scientific method to reveal general truths about our world.
Notes
The scientific method begins with observations of the world around us. Students should be made to understand that "observations" are more than visual; to a scientist, an observation is anything that can be detected by our senses, or by instruments. Note also the feedback relationship between experiment and theory: This feature can be used to explore the tentative character of scientific truth. Scientists accept a theory as true only as long as experiments do not contradict the theory.
Keywords
science, method, observations, law, theory, experiment, flowchart

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