Why does AIR have matter?

Observe MatterQuestions1. Was anything in the

cup besides the paper? If so, what was it?

2. Feel the paper towel, is it dry or wet?

MatterWhat is it?

Matter is …The amount of MASS in an object and the amount of space an object takes up (VOLUME).

What Matter is not…

Light & Heat

Anything that does not take up space.

Physical Statesof

Matter

Solid

Has definite shape and definite volumeExamples …

Liquid

It will fill up the shape of a container and has definite volume. Example …

Gas

Fills a container of any size or shape.Example …

What about Plasma?

Not normally found on Earth; similar to gasExample

Northern Lights Ball LightningFluorescent light bulb

Physical PropertiesWhat are

they?

5 SensesAnything that we can identify with our five senses – except

SMELL & TASTEWHY? Smell and taste use chemical receptors in the mouth and nose

MeasurementsAny size or shape…Size, Volume, Area, Diameter, Radius, Mass, Density, Length, Shape, Temperature, …

More Properties…Melting Point– point at which matter melts.Freezing Point. – the point at which matter freezes.Boiling Point. – the point at which matter boils.

Metallic PropertiesMagnetic attraction – the attractions between metals.Malleability – ability TO BE hammered into thin sheets.Ductility – ability TO BE drawn into thin wires. Luster - shiny ; reflective

Chemical Properties

Any characteristic that gives a substance the ability to undergo a change that results in a new substance

Chemical Properties Flammability (able to burn)

Ability to react with oxygen

Ability to react with acids

Law of Conservation of Matter

Matter is neither created nor destroyed. It only TRANSFORMS. For

Example

Wood + Oxygen Ash + Gases + Water

Physical Change

When a physical property is changed but the matter remains the same

It’s a physical change if…

It changes shape or size

It dissolves.Some can be changed back

Examples

Water boilingGlass brokenSandpaper on a piece of woodEtc…

Change in the identity of the substance

Chemical Change

NaHCO3 + CH3COOH CH3COO-Na+ + H2O + CO2

Sodium bicarbonate and vinegar => Sodium acetate and water and carbon dioxideHeat is released

Baking Soda + Vinegar

It’s a chemical change if….

It burns

Temperature changes without heating/cooling

It’s a chemical change if...

It bubbles (makes a gas)

Reacts with acid

It’s a chemical change if... It changes color

It forms a precipitate (a solid)

It’s a chemical change if...

Corrosion (Rust or

Oxidation)

What kind of change is it if someone...

Tears up paper? Physical change Mixes salt and water? Physical change

What kind of change is it if someone...

Burns paper? Chemical change Evaporates salt water? Physical change

How is a burning candle both?