Chemical & Physical Properties of Matter

Chemical Properties• Characteristics that are observed

ONLY when a substance changes into a different substance

Chemical Properties• Types of Chemical Properties:

• Combustible/flammable: • able to burn

• Examples & Facts:• all chemicals come with a

label that identifies their level of flammability

Chemical Properties• Types of Chemical Properties:

• Combustible/flammable: • able to burn• http://youtu.be/EZ3JT2nWfMA

• Examples & Facts:• oxygen & hydrogen are very flammable

gases• carbon dioxide is not a very flammable

gas

Hay Bale combusting• http://www.youtube.com/watch?v=

zRNCrHqD0zE• Stop at 35 seconds

Chemical Properties• Types of Chemical Properties:

• Reactivity: • how easily a substance reacts

with another substance• http://youtu.be/sS3cIK9jlB8

• Examples & Facts:• many chemicals react with

water or oxygen• all chemicals come with a

label that identifies their level of reactivity

Chemical Properties• Types of Chemical Properties:

• Reactivity: • how easily a substance

reacts with another substance

• Examples & Facts:• corrosion: slow reaction

& wearing away of metals (rusting, tarnishing)

Examples of Chemical Changes

Physical Properties• Characteristics that can be

observed without changing the substance into something else

Physical Properties• Types of Physical Properties:

• color• texture• odor• taste• hardness• magnetic• boiling, melting, & freezing

points

Physical Properties• Types of Physical Properties:

• Luster:• shininess or dullness

• Examples & Facts:• most metals are shiny• diamonds have a lot of

luster• many minerals are dull

Physical Properties• Types of Physical Properties:

• Brittleness:• how easily a substance breaks into pieces

• Examples & Facts:• very brittle substances

may crumble or break with very little force

Physical Properties• Types of Physical Properties:

• Brittleness:• how easily a substance breaks into pieces

• Examples & Facts:• many rocks & minerals

are brittle• chalk is brittle because

it crumbles easily

Physical Properties• Types of Physical Properties:

• Malleable:• can be pounded into shapes

• Examples & Facts:• aluminum is very malleable• clay is also malleable• substances that are malleable

are usually not very brittle

Properties Song• http://www.youtube.com/watch?v=

uJOGy0dgmUU

Physical Properties• Types of Physical Properties:

• Ductile:• can be pulled out into a long wire

• Examples & Facts:• substances may be both malleable

& ductile• copper is very malleable &

ductile• substances that are ductile

are usually not very brittle

Physical Properties• Types of Physical Properties:

• Conductive:• can transmit heat and/or electricity

• Examples & Facts:• a substance may conduct heat,

electricity, neither, or both• most metals are good

conductors

Physical Properties• Types of Physical Properties:

• Conductive:• can transmit heat and/or

electricity

• Examples & Facts:• pots & pans are made out of metals

that are good heat conductors

Physical Properties• Types of Physical Properties:

• Soluble:• can be dissolved in a liquid

• Examples & Facts:• substances that are “water-

soluble” will dissolve in water• salt & sugar are soluble in

water• substances that don’t dissolve

are “insoluble”

Overview of Physical & Chemical properties• http://youtu.be/oF0lN0jZYx0

• http://www.youtube.com/watch?v=C4pQQQNwy30

Models are representations of objects or systems.

Models can be used for:• Understanding something• Predicting• Picturing things in your mind• Explain scientific theories

Physical Models

• look like the object they model.

Mathematical models

• Made up of mathematical equations and data

Conceptual models

• Systems of ideas.

Limitation of Models• They don’t act exactly like the

things they model or they may not look like the things they represent. Scale might be incorrect.

• What is wrong with this model?

Extra information on Chemical & Physical • http://education-portal.com/acade

my/lesson/matter-physical-and-chemical-properties.html#transcript

• Just watch from 1:50 to 4:20 on video