# The Matter of Facts!.

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The Matter of Facts!

Matter Everything around us is matter! So what’s the matter?
Anything that has mass and takes up space. Everything around us is matter! So what’s the matter? It’s a matter of fact(s)!

Identifying Matter What’s the matter?

Physical Properties of Matter
Physical properties are characteristics of a substance that can be observed or measured without changing the substance into something else. Color Hardness Taste Length Width Height Weight Mass Volume Density Ability to conduct heat, electricity, or sound Ability to become a magnet

Mass – The amount of matter in an object.
Scientists use a balance scale to measure mass. The object’s unknown mass is compared to a known mass. Mass is recorded in grams or kilograms

Weight – A measure of the pull of gravity on an object.

What are some of the physical properties of these boxes?

Can you find ways to tell these apples apart?

Volume = length X width X height expressed in cubic units
Volume – The amount of space an object takes up. Volume = length X width X height V = l x w x h expressed in cubic units Simple enough when it is a box, but what if the solid is irregular? What if you wanted to know the volume of an apple? What then?

Volume can be found by measuring Displacement
Measurement of the amount of liquid that a solid displaces. 1cu3=1ml -

You can use a graduated cylinder such as one of these!

When using a graduated cylinder to measure, you must
be careful to measure the bottom of the level of liquid. This curved look of the liquid is known as the meniscus.

Density Concentration of Matter in an object Density equals mass
divided by volume

States of Matter No, not those states, these states…..

3 States or Phases of Matter
Solid: Has a definite shape Has a definite volume Molecules are very close together Liquid: Does not have a definite shape (will take the shape of a container) Molecules are a little further apart and vibrate a bit quickly Gas: Does not have a definite volume Molecules are very far apart and vibrate very quickly!

The changing of the states or phases of matter

Changes in state are physical. They do not change the substance.
Changes in state are reversible! Freezing - liquid to solid Melting - solid to liquid Boiling - liquid to gas Condensation - gas to liquid Sublimation - solid to gas Evaporation - when particles escape from a nonboiling liquid and become a gas

Melting and Boiling Points
Melting Point & Freezing Point are the same! Water freezes at 0C or 32F Boiling Point Temperature at which a substance changes from a liquid to a gas. Water boils at 100C or 212F

Fahrenheit and Celsius Temperatures
Conversion of Fahrenheit and Celsius Temperatures Formula °C  x  9/ = °F (°F  -  32)  x  5/9 = °C

Mixtures Combination of 2 or more different kinds of matter that keep their own physical properties and can be easily separated. Solution - Type of mixture in which particles of 2 or more substances are mixed and not easily separated.

Solubility - the ability to be dissolved.
Solutions are not easily separated Sugar is soluble in water. Pepper is not!

Suspension - a mixture of liquids with particles of a solid which may not dissolve in the liquid.
The solid may be separated from the liquid by leaving it to stand, or by filtration Examples: sand in water oil in water

Chemical Properties of Matter
Changes in which one or more new substances are formed are called chemical changes or reactions.

Marshmallow melting is physical change.
Marshmallow burning is a chemical change

Sodium + Chlorine = Sodium Chloride (Salt)
These are examples of chemical change or reactivity because light or heat or both are produced. Burning Candle

Reactivity - The ability of a substance to react chemically
Clues that identify reactivity or chemical change: Change in color Production of light Production of heat Production of a gas

Baking soda + vinegar = gas Carbon dioxide is produced
Reactivity Example! Baking soda + vinegar = gas Carbon dioxide is produced

Reactivity Example! Burning Candle - heat and light are produced

Chemical Reaction Iron rusting is an example of
chemical reaction or change A change in color occurs Iron conducts electricity Rust does not conduct electricity Different densities Different melting points

Chemical property of being able to burn.
Combustibility Chemical property of being able to burn.

Used to identify substances based
Flame Test Used to identify substances based on the color of the flame they produce when burned.

Law of Conservation of Matter
Matter is neither created nor destroyed during a physical or chemical change. The amount of matter is always the same.

The END for now….more madness to come later!