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. nitrogen2.Copper 7. smoke3.Orange juice with pulp 8. DNA4.salt 9. radon5.Chromium 10. Salt water

Review

• Identify the following as colloids, suspensions, or solutions.

AB 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 substanceExamples: 1.sharpening a pencil = shorter pencil, but still a pencil = change in size2.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 substanceExamples: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 ash3.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 tree2.Digesting food3.A car engine running4.Mixing vinegar and baking soda5.Melting iron6.Making a horseshoe from a steel bar

Physical and Chemical Properties Cheat Sheet

Physical Properties Chemical PropertiesAppearance withoutchanging the substance

Appears when substancechanges into else

Includes:phase, color, odor,density, conductivity,malleability, ductility

Includes:ReactivityCombustibility (burning)Corrosive (rusting)

Physical or Chemical Property

Copy the following and identify each as a physical or chemical property:1.Purple gas2.Sodium reacts with water in the air3.Phosphorus burns in air4.Freezing point 100 K5.Brown solid6.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

Physical Change

ChemicalProperties

ChemicalChange

Inside of Foldable

Definition ofPhysical Properties

Definition ofChemicalProperties

Definition ofPhysical Change

Definition ofChemicalChange

Drawing andExamples ofPhysical Properties

Drawing andExamples ofChemicalProperties

Drawing andExamples ofPhysical Changes

Drawing andExamples ofChemicalChanges

Exit Slip

• Give an example of a physical change.• Give an example of a chemical change.