Chemistry Test Chemistry Test Reassessment ReviewReassessment Review

Make sure you click “Slideshow” then Make sure you click “Slideshow” then choose “From Beginning” to view the choose “From Beginning” to view the

animations.animations.

Complete the notes worksheet as you Complete the notes worksheet as you go through the PowerPoint.go through the PowerPoint.

Physical and Physical and Chemical Chemical

Properties and Properties and ChangesChanges

PropertyProperty►Is a Is a

description of description of an objectan object

The tree is TALLThe tree is GREEN

If struck by lighting, the tree could catch FIRE (BURN)

Physical PropertiesPhysical Properties

► Are determined by the use of the Are determined by the use of the ..

► They are a They are a of an of an object.object.

fivesenses

description

Examples of Physical Examples of Physical PropertiesProperties

Color

Smell

Taste

HardnessState of MatterBoiling, Freezing, or Melting Point

Examples of Physical Examples of Physical PropertiesProperties

Density

Mass

Volume

Malleability (the ability to be molded)Solubility (the ability to be dissolved)

Chemical PropertiesChemical Properties

► Are determined by Are determined by a substance’s a substance’s ability to ability to

with other with other substances.substances.

react

Examples of Chemical Examples of Chemical PropertiesProperties

•The ability to react with

-

-

-

-

•The ability to react with

•The ability to catch fire ()

air

rust

tarnishcorrode

rot

water/acids

flammability

Physical or Chemical Physical or Chemical Property?Property?

► Ability of gun Ability of gun powder and fire to powder and fire to explode.explode.

Chemical Property

Physical or Chemical Physical or Chemical Property?Property?

► The color of a sunset.The color of a sunset.

Physical Property

Physical or Chemical Physical or Chemical Property?Property?

► The ability of a The ability of a nail to rust.nail to rust.

Chemical Property

Physical or Chemical Physical or Chemical Property?Property?

► The shape of a The shape of a leaf.leaf.

Physical Property

Physical or Chemical Physical or Chemical Property?Property?

► The ability of The ability of wood to burn.wood to burn.

Chemical Property

Physical or Chemical Physical or Chemical Property?Property?

► The hardness of a The hardness of a diamond.diamond.

Physical Property

Physical or Chemical Physical or Chemical Property?Property?

► The volume of The volume of your coke.your coke.

Physical Property

Physical or Chemical Physical or Chemical Property?Property?

► The mass of two camels. The mass of two camels.

Physical Property

Physical ChangesPhysical Changes► a change that occurs a change that occurs

changing changing the the of the of the substance.substance.

► ____ new substances are ____ new substances are formed.formed.

withoutidentity

No

Examples of Physical Examples of Physical ChangesChanges

► Change in size, Change in size, shape, or colorshape, or color

► Pencil shavingsPencil shavings► Torn PaperTorn Paper► Crushed iceCrushed ice► Sugar dissolved in Sugar dissolved in

waterwater

Chemical ChangesChemical Changes► a change that occurs a change that occurs

that that the the of a of a substance to change; substance to change; something something is is formed.formed.

► New substances with New substances with properties properties

are formedare formed

causesidentity

new

new

Evidence of Chemical Change

•New ________appears

•Bubbbles or ________

•Precipitate forms (____ material)

•_____ is produced

•______ is produced

•______ is given off

•Difficult or impossible to __________

color

fizzing

solid

reverse

Heat

Light

Sound

Reactions with AcidReactions with Acid

► Vinegar + baking Vinegar + baking soda = release of soda = release of Carbon Dioxide Carbon Dioxide GasGas

Reactions with Reactions with OxygenOxygen

► OXIDATIONOXIDATION

► Iron + Oxygen = Iron + Oxygen = rustrust

Reactions with Reactions with ElectricityElectricity

► Silver PlatingSilver Plating

Reactions between Reactions between SubstancesSubstances

► Sodium + chloride = saltSodium + chloride = salt

► Silver + sulfer in the air = Silver + sulfer in the air = tarnishtarnish

Other ExamplesOther Examples►Wood burningWood burning►Metal rustingMetal rusting►Food digestingFood digesting►Gasoline burningGasoline burning►Cake bakingCake baking

Physical or Chemical Physical or Chemical Change?Change?

►Water Water evaporates from evaporates from the ocean.the ocean.

Physical or Chemical Physical or Chemical Change?Change?

►The yolk of an The yolk of an egg, which egg, which contains sulfur, contains sulfur, causes tarnish causes tarnish to form on to form on silver.silver.

Physical or Chemical Physical or Chemical Change?Change?

►The ice on a lake The ice on a lake melts to become melts to become water in the water in the lake.lake.

Physical or Chemical Physical or Chemical Change?Change?

►Charcoal in a fire Charcoal in a fire turns to ash turns to ash after several after several hours.hours.

Physical or Chemical Physical or Chemical Change?Change?

►A pencil is A pencil is sharpened in a sharpened in a pencil pencil sharpener, sharpener, leaving behind leaving behind shavings.shavings.

Physical or Chemical Physical or Chemical Change?Change?

►A battery makes A battery makes electricity to electricity to turn on a turn on a flashlight.flashlight.

Physical or Chemical Physical or Chemical Change?Change?

►A bicycle rusts when left in the rain.A bicycle rusts when left in the rain.

Physical or Chemical Physical or Chemical Change?Change?

►A shirt is A shirt is accidentally torn accidentally torn in the washing in the washing machine.machine.

Physical or Chemical Physical or Chemical Change?Change?

►A log is split in A log is split in two by an axe.two by an axe.