physical vs. chemical changes. anything with mass and volume
TRANSCRIPT
Physicalvs.
ChemicalChanges
Anything with
mass AND volume
A characteristic of matter such as size, shape or phase
can be observed (with your senses) and measured.
Density, boiling point, melting point,
hardness, mass, volume, color, size,
shape, texture, malleability, viscosity, smell, taste and more!!!
A property of a single substance that cannot be easily observed
describes how the substance likes to combine (REACT) with other substances.
flammability and reactivity
X
XX
XXXXX
XXX
X
X
X
Keeps most properties, DOES NOT create a new substance
Changing shape of something, changing its phase, adding paint, making smaller pieces
Beautiful Chemistry:-Crystallization-Compare Liquids and Gases
Physical Changes
Gallium Spoon has a Very low melting point
Physical Changes
Not all color changes are Chemical Changes
A NEW substance is created, two separate substances combine and rearrange their atoms. The new substance will have DIFFERENT properties.
Beautiful Chemistry: -Gas Released-Color Change-Precipitate Formed 1, Precipitate Formed 2-New properties
Beautiful Chemistry Website
Chemical Changes
Chemical Changes
Slo Mo Match Strike
P
P
P
P
P
P
C
PP
C
C
C
C
C
C
C
P
Changing shape
Boiling- phase change
New properties, something new created (dirt)
phase change
phase changeNew properties, something new created
Same properties, nothing new created
Same properties, nothing new created
New properties, something new created (iron oxide)
New properties, something new created
Something new created (photosynthesis, new cells)
Changing shapeNew properties, Energy! created
Same properties, nothing new created
phase change
Energy change!
Day 2
Let’s Review What We Know! (use your Physical Vs. Chemical Properties notes!)
Does not create a new substance- keeps most properties
Ex: changing shape (cutting, breaking) adding color (paint, markers)
A new substance is created. Atoms or Molecules are rearranged to form something with different properties.Energy changes.
If we have time…
• Pick a partner. Send one of your pair up to get a bag for the physical vs. chemical change sorting game.
• Pull out the examples and make two piles:– physical changes– chemical changes
• Record your answers on your demo data sheet (bottom of the back).