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What is matter?

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by

Aliza Cruz

on 22 September 2014

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Transcript of What is matter?

Please take out your chemistry notebook and turn to last night's homework.

At the end of your homework, create a table with two columns. Label one column "Matter" and the other "Not Matter."
Whatsamatter?
What is Matter?
Put each word or phrase in the correct column of your table in your notebook:

Air, Sunlight, Rain, Sadness, Wind, Ideas, Automobile, Electricity, Energy, Breath, Democracy, Ocean, Peanuts, Waves, Cars, Traffic, Gravity, Rainbows, Microwaves, Microwave Ovens, Books, Sound, Plants, Love, Baseballs
Classify the following as matter or not matter.
What items on your list are you SURE are matter? What do these things have in common?

What items do you and your partner disagree on? Why or how are your thoughts on these items as matter or non-matter different?
Compare your list with your table partner's.
Matter
: Air, Rain, Automobile, Breath, Ocean, Peanuts, Cars, Microwave Ovens, Books, Plants, Baseballs

Not Matter
: Sunlight, Sadness, Wind, Ideas, Electricity, Energy, Democracy, Waves, Traffic, Gravity, Rainbows, Microwaves, Sound, Love
Check your answers!
Matter doesn't have to be visible!

Mass
: A measure of the amount of matter

Volume
: A measure of the amount of space occupied by matter
Matter is anything that has mass and volume.
The state (or phase) of matter is determined by the motion of molecules that make up the matter and the attraction between those molecules.

There are four states of matter that are observable in everyday life.
States of Matter
Pure substances
are of uniform composition and cannot be separated by physical methods into more than one component.

Two subclasses: Elements and Compounds
Pure Substances
A
mixture
is two or more pure substances that are physically combined but not chemically bonded together.

Can be separated by physical means, such as evaporation or filtering.

Two subclasses: Homogeneous Mixtures and Heterogeneous Mixtures
Mixtures
Definite shape and volume
Atoms are packed tightly together and vibrate in place
Crystals (i.e. salt, diamonds, sugar)
Amorphous solids (i.e. plastic, glass, rubber)
Solid
Definite volume but not definite shape
Particles are close together but move freely
Viscosity
Surface tension
Liquid
No definite volume or shape; takes the shape and size of its container
Molecules move freely
Air
Vapor
Gas
Like a gas
Made of electrically-charged particles and very hot!
Examples: Sun and other stars, neon lights, pixels of a plasma TV screen
Plasma
Compounds
are substances that are made up of two atoms from two or more elements.

Molecular compounds
- Form between nonmetal atoms

Ionic compounds
- Form between a metal and a nonmetal atom

Examples: CO, NaCN, ethanol, water
Compounds
An
element
is the simplest form of a pure substance.

An
atom
is the smallest unit of an element that retains all of the properties of that element

Each element has unique atoms that are unlike the atoms of any other element.

Examples: Al, As, Au, C, Na, O, Pb
Elements
1. Label each of the containers A, B, C, D, and E as either a pure substance or a mixture.

2. Label each of the containers A, B, C, D, and E as containing either elements, compounds, or both.
Let's Practice!
Composition varies from one region of a sample to another.

Using various means, the parts of a heterogeneous mixture may be separated from one another.

Examples: Soil, pond water, garbage, trail mix, oatmeal with raisins

What examples can you think of?
Heterogeneous Mixtures
The same throughout: A sample from one part of the mixture will be chemically identical to a sample from any other part.

Alloys
are mixtures of metallic elements, such as lead bullets or the steel in a metal truck bumper.

Examples: Air, lighter fluid, wine, gasoline

What examples can you think of?

Homogeneous Mixtures
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