why does air have matter? observe matter questions was anything in the cup besides the paper? if...
TRANSCRIPT
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?