Transcript Do Now:
Do Now:
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
Chemistry is the study of materials and the
changes they undergo.
Chemists classify change into two types:
Physical change
Chemical change
Physical changes
Definition
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
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
Definition
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
Chemical Change (continued)
Formation of a precipitate (Solid from solution)