Transcript Do Now:

Do Now:
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Keep your notebook, and chapter 1.4-1.7
homework at your desk. (these will be collected)
Move all other books, bags notes to the front of
the room
Sit spaced apart.
Change
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Chemistry is the study of materials and the
changes they undergo.
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Chemists classify change into two types:
Physical change
 Chemical change
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Physical changes
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Definition
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The molecular (chemical) compostion of the material
remains unchanged. The bulk sample of material can be
torn, deformed, and change states (solid, liquid, gas) but still
retains essentially the same physical properties (odor, color,
etc)
Evidence
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The bulk sample of material can be torn, deformed, or
change states (solid, liquid, gas) but retains essentially the
same physical properties (odor, color…)
Chemical Changes
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Definition
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Molecular structures are changed. The chemical
composition of the material is fundamentally
changed
Evidence
Color change
 Formation of a new state of matter, at the same
temperature
 Generation of heat, light, or other energy
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Chemical Change (continued)
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Formation of a precipitate (Solid from solution)