Day 49
Starter Day 47
• Describe how a glass of milk changes as it sits
out on a table for several days in a hot room.
Review
Classify each of the following as homogeneous
mixture, heterogeneous mixture, metal, nonmetal,
or compound:
1. 14 Kt. Gold bracelet
6. nitrogen
2. Copper
7. smoke
3. Orange juice with pulp
8. DNA
4. salt
9. radon
5. Chromium
10. Salt water
Review
• Identify the following as colloids, suspensions,
or solutions.
A
B
C
D
Who am I?
1. Write at least 5 things that describe your
person. Fold the paper in fourths and place it
in the basket.
2. Line up along the sides of the room; half on
each side facing each other.
3. Draw slip from the basket. One by one read
the descriptions aloud and try to identify
who it describes.
Physical Changes
Does not change the substance
Examples:
1. sharpening a pencil = shorter pencil, but still
a pencil = change in size
2. Freezing water = solid water, but still water =
change in phase (state)
3. Breaking a window = small, irregular pieces
of glass, but still glass = change is shape
Chemical Changes
Changes the substance
Examples:
1. Ripening banana = changes color from green
to yellow to brown to black = gives off gas,
gets softer and sweeter
2. Burning wood = changes color, gives off
water and smoke = leaves ash
3. Souring milk = odor, forms solids
Indicators of a reaction (change)
•
•
•
•
Color change
Change in properties
Precipitate (solid forms)
Gas production
Physical or Chemical Change
Copy the following and identify each as a
physical or chemical change:
1. Making flooring from a tree
2. Digesting food
3. A car engine running
4. Mixing vinegar and baking soda
5. Melting iron
6. Making a horseshoe from a steel bar
Physical and Chemical Properties
Cheat Sheet
Physical Properties
Chemical Properties
Appearance without
Appears when substance
changing the substance changes into else
Includes:
phase, color, odor,
density, conductivity,
malleability, ductility
Includes:
Reactivity
Combustibility (burning)
Corrosive (rusting)
Physical or Chemical Property
Copy the following and identify each as a
physical or chemical property:
1. Purple gas
2. Sodium reacts with water in the air
3. Phosphorus burns in air
4. Freezing point 100 K
5. Brown solid
6. Boiling point 59°C
Foldable
• Fold and cut paper to make a foldable with 4
doors. Using the next 2 slides, complete your
foldable.
Physical and Chemical Change Foldable
Physical
Properties
Chemical
Properties
Physical
Change
Chemical
Change
Inside of Foldable
Definition of
Physical
Properties
Drawing and
Examples of
Physical
Properties
Drawing and
Examples of
Chemical
Properties
Definition of
Physical
Change
Drawing and
Examples of
Physical
Changes
Drawing and
Examples of
Chemical
Changes
Definition of
Chemical
Properties
Definition of
Chemical
Change
Exit Slip
• Give an example of a physical change.
• Give an example of a chemical change.