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: 14 Kt. Gold bracelet 6. nitrogen Copper 7. smoke Orange juice with pulp 8. DNA salt 9. radon Chromium 10. Salt water

Review Identify the following as colloids, suspensions, or solutions. B C D A

Who am I? Write at least 5 things that describe your person. Fold the paper in fourths and place it in the basket. Line up along the sides of the room; half on each side facing each other. 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: sharpening a pencil = shorter pencil, but still a pencil = change in size Freezing water = solid water, but still water = change in phase (state) Breaking a window = small, irregular pieces of glass, but still glass = change is shape

Chemical Changes Changes the substance Examples: Ripening banana = changes color from green to yellow to brown to black = gives off gas, gets softer and sweeter Burning wood = changes color, gives off water and smoke = leaves ash 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: Making flooring from a tree Digesting food A car engine running Mixing vinegar and baking soda Melting iron Making a horseshoe from a steel bar

Physical and Chemical Properties Cheat Sheet Physical Properties Chemical Properties Appearance without changing the substance Appears when 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: Purple gas Sodium reacts with water in the air Phosphorus burns in air Freezing point 100 K Brown solid 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 Properties Chemical Properties Physical Change Chemical Change

Inside of Foldable Drawing and Examples of Physical Properties Chemical Properties Definition of Chemical Properties Definition of Physical Properties Drawing and Examples of Physical Changes Drawing and Examples of Chemical Changes Definition of Physical Change Definition of Chemical Change

Exit Slip Give an example of a physical change. Give an example of a chemical change.