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Matter by Asheton Hooper

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Asheton Hooper

on 3 October 2013

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Transcript of Matter by Asheton Hooper

MATTER
Pure Substance
Definition
A substance that is always the same composition and doesn't change
Facts/Characteristics
1. Elements and compounds
2. Can only be separated by a chemical reaction
Examples
1. Gold
2. Water (H20)
Element
Definition
A type of matter that is in its simplest form and cannot be broken down
Facts/Characteristics
1. Has a fixed composition
2. Has only one type of atom
Examples
1. Silver (Ag)
2. Iron (Fe)
Compound
Definition
A substance that contains 2 or more atoms that are chemically combined
Facts/Characteristics
1. Can be broken down into the original substances
2. Compounds have different properties than the original substances
Examples
1. Oxygen
Mixture
Illustration
Illustration
Definition
Two or more substances that are physically combined
Facts/Characteristics
1. Mixtures can be heterogeneous or homogeneous
2. Composition is not fixed
Examples
1. Tea is a homogeneous mixture
2. Salad is a heterogeneous mixture
Illustration
Tea is a mixture because it is made by stirring sugar into water
Homogeneous
Definition
A mixture that is blended evenly
Facts/Characteristics
1. Individual substances cannot be seen
2. The individual substances in the mixture have the same properties as the originals
Examples
1. Water in a swimming pool
2. Milk
Heterogeneous
Definition
A mixture with individual substances that can be seen
Facts/Characteristics
1. Individual parts are not constant throughout the mixture
2. Original substances can be easily separated
Examples
1. Pizza
2. Trail mix
Illustration
Trail Mix is an example of a heterogeneous mixture because the different parts can easily be seen and separated
Physical Property
Definition
A characteristic that can be observed/measured without changing the substance
Facts/Characteristics
1. Help us identify a type of matter
2. Only deals with the outside appearance of a substance
Examples
1. Color
2. Viscosity
Illustration
Syrup's viscosity is an example of a physical property because it can be measured without changing the composition of the substance
Phase Change
Definition
When a substance changes from one type of matter to another
Facts/Characteristics
1. Can be reversed
2. Changes to either a solid, liquid, gas or plasma
Examples
1. ice melting
2. Water being evaporated in to gas
Density
Definition
A measure of how much matter is in an object
Facts/Characteristics
1. The formula to find density is d=m/v
2. Any item/substance with a density of less than 1 will float in water
Examples
1. A bowling ball is more dense than a basket ball
2. In a oil spill, the oil will float on the water
Illustration
Illustration
A bowling ball is more dense than a basket ball because it has more matter inside it.
Gold is an example of a pure substance because it has a constant composition
The Periodic Table of Elements includes all of the known elements
2. Carbon Dioxide
Carbon Dioxide is an example of a compound because it is made up of 2 oxygen atoms and one carbon atom
Illustration
Milk is an example of a homogeneous mixture because it appears to be one substance
Illustration
Melting ice is an example of a physical change because it goes from being a solid to a liquid.
Physical Change
Definition
A change in size, shape, or type of matter, but not changing chemically
Facts/Characteristics
1. Some physical changes can be reversed
2. The composition of the substance does not change
Examples
1. Water boiling
2. Ripping paper
Illustration
Ripping paper is a physical change because there is only a change in the size of the paper.
Chemical Property
Definition
Describes how matter reacts to other matter
Facts/Characteristics
1. Can be observed only when substances are changing into different substances
2. Chemical properties show the substance's potential to experience a chemical change
Examples
1. Flammability
2. Oxidation
Illustration
Flammability is an example of a chemical property because it describes how a substance can burn.
Reactivity
Definition
How easily a substance chemically combines with another substance
Facts/Characteristics
1. Can also describe how fast a substance reacts
2. Nitrogen can prevent reactivity between oxygen, iron and water
Examples
1. An iron fence rusting
2. Photosynthesis
Illustration
Chemical Change
Definition
The process of a substance becoming a new substance
Facts/Characteristics
1. One type of evidence of a chemical change is a change in color
2. Another type of evidence is the production of gas
Examples
1. Change in temperature
2. A candle burning
Illustration
Current Event Article
Who?
McDonald's
Did What?
Offer more healthier options instead of fries, like salads, and offer milk for Happy Meals
Where?
McDonald's in the United States
Why?
They want families to have healthier lifestyle because obesity is a growing problem in America
Reference
"McDonald's to Offer Salad, Fruit as Options
Instead of Fries." CNBC.com. CNBC.com, 27 Sept. 2013. Web. 02 Oct. 2013. <http://www.cnbc.com/id/101066604>.
Rusting is an example of reactivity because the oxygen in the air reacts with iron and water to make rust.
A candle burning is an example of a chemical change because it gives off a smell and gas is produced.
Full transcript