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Now let’s FOLD!!!

1) Fold paper in half like a hamburger.

2) Leave a small ½ inch edge for the title: PHASES/STATES OF MATTER

3) Cut three flaps (two cuts) up to the fold on the short side of the paper.

4) Label your three flaps: SOLID, LIQUID, GAS.

States or Phases of Matter: SOLID

Solid: matter that has a: definite shape + definite volume

• molecules do move slightly (vibrate)

• Incompressible: Will not squish

Ex. Legos: Def Shape + Volume, closely packed..move only slightly…SOLID

Fixed, does not change

Structure: Particles: tightly packed, Rigid, Organized, Crystalline

Liquid Liquid: a form of matter that: has an indefinite shape, but a definite volume.

• Particles are held loosely together (free to move)

• Particles can move (slide) past one another (flow) FLUID

• Almost incompressible

(slightly compressible)

Gas

Gas: form of matter that: has indefinite shape + indefinite volume.

• Particles are spaced: far apart (fill entire space).

• Particles easily move past one another (flow) FLUID!!!

• Easily compressible: Can be squished a LOT (ex. helium tank).

• Lots of collisions and space between particles

Changes easily!!!

Plasma

• Plasma: high-energy state in which ions exist in a gas-like form

• Gas-like properties

• Can be found in the: stars, lightning, TV’s (Ne & Xe)

• No known material can withstand hot, corrosive plasma

To Review: Solid Liquid Gas Plasma

Shape

X

Volume

X

Compressibility

X

Def.

Def.

Incomp.

Indef.

Def.

Incomp.

Indef.

Indef.

Comp.

Make a foldable like this:

Announcements: LAB: Observing Physical and Chemical Changes (on Thursday – wear closed toe shoes!)

PHYSICAL

PROPERTY

CHEMICAL

PROPERTY

EXTENSIVE

PROPERTY

INTENSIVE

PROPERTY

CHEMICAL

CHANGE

PHYSICAL

CHANGE

Physical &

Chemical

Properties

Physical Property

A quality or condition of a

substance that can be

observed or measured without

changing the substances

composition.

Physical Property Examples of Physical Properties:

Solubility (if it dissolves)

Color

Density

Melting point

Chemical Property

The ability of a substance to

undergo a chemical reaction

and to form a new substance

Chemical Property

Examples of Chemical Properties:

Rusting

Combustion

Flammability

www.elmhurst.edu/~chm/vchembook/105Achemprop.html

Physical Property (PP) or

Chemical Property (CP)?

blue-gray color

brittle

insoluble (will not dissolve) in water

reacts with acid

PP PP

PP CP

Extensive &

Intensive

Properties

Extensive physical properties

Physical properties of matter that

depend on the amount of that

chemical

Mass

Volume

Length

Shape

Intensive physical properties

Physical property of matter that

DOES NOT depend on the amount of

that chemical

Color

Melting point

Density

Physical &

Chemical

Changes

Physical Change

A change which alters a

given material without

changing its composition

(nothing new created)

Physical Change

examples:

Physical Changes

Any phase/state change

Dissolving of a solid

Crushing of a solid – change in size/shape

Physical Changes

Dry ice sublimation

http://www.elmhurst.edu/~chm/vchembook/104Aphysprop.html

Physical Changes Water boiling

Physical Changes

Salt Dissolving

www.bbc.co.uk/.../reversible_irreversible4.shtml

Physical Changes

www.earthscienceworld.org/images/search/resul...

palm.sri.com/tasks/9-12/Fishkill/

Thermal Pollution

Chemical Change

aka (Chemical Reaction)

Change that occurs

when one or more

substances change into

new substances

Chemical Change

Rusting of iron

Chemical Change

Photosynthesis

http://students.salisbury.edu/~ak09850/images/photosynthesisBASIC.jpg

Chemical Change

Digestion of food

Chemical Change

Combustion (burning) of gas

Chemical Change

Clues that a chemical reaction is

occurring:

Energy is absorbed / given off (heat or light)

Change in color or odor

Production of a gas or solid from a liquid

Not easily reversible

Something NEW produced that does NOT

look like the starting reactants

A + B Q

Physical or Chemical Change?

Bending of wire

Milk turning sour

Paper shredded

Burning of coal

PC

CC

PC

CC