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Matter by Asheton Hooper
Transcript of Matter by Asheton Hooper
A substance that is always the same composition and doesn't change
1. Elements and compounds
2. Can only be separated by a chemical reaction
2. Water (H20)
A type of matter that is in its simplest form and cannot be broken down
1. Has a fixed composition
2. Has only one type of atom
1. Silver (Ag)
2. Iron (Fe)
A substance that contains 2 or more atoms that are chemically combined
1. Can be broken down into the original substances
2. Compounds have different properties than the original substances
Two or more substances that are physically combined
1. Mixtures can be heterogeneous or homogeneous
2. Composition is not fixed
1. Tea is a homogeneous mixture
2. Salad is a heterogeneous mixture
Tea is a mixture because it is made by stirring sugar into water
A mixture that is blended evenly
1. Individual substances cannot be seen
2. The individual substances in the mixture have the same properties as the originals
1. Water in a swimming pool
A mixture with individual substances that can be seen
1. Individual parts are not constant throughout the mixture
2. Original substances can be easily separated
2. Trail mix
Trail Mix is an example of a heterogeneous mixture because the different parts can easily be seen and separated
A characteristic that can be observed/measured without changing the substance
1. Help us identify a type of matter
2. Only deals with the outside appearance of a substance
Syrup's viscosity is an example of a physical property because it can be measured without changing the composition of the substance
When a substance changes from one type of matter to another
1. Can be reversed
2. Changes to either a solid, liquid, gas or plasma
1. ice melting
2. Water being evaporated in to gas
A measure of how much matter is in an object
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
1. A bowling ball is more dense than a basket ball
2. In a oil spill, the oil will float on the water
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
Milk is an example of a homogeneous mixture because it appears to be one substance
Melting ice is an example of a physical change because it goes from being a solid to a liquid.
A change in size, shape, or type of matter, but not changing chemically
1. Some physical changes can be reversed
2. The composition of the substance does not change
1. Water boiling
2. Ripping paper
Ripping paper is a physical change because there is only a change in the size of the paper.
Describes how matter reacts to other matter
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
Flammability is an example of a chemical property because it describes how a substance can burn.
How easily a substance chemically combines with another substance
1. Can also describe how fast a substance reacts
2. Nitrogen can prevent reactivity between oxygen, iron and water
1. An iron fence rusting
The process of a substance becoming a new substance
1. One type of evidence of a chemical change is a change in color
2. Another type of evidence is the production of gas
1. Change in temperature
2. A candle burning
Current Event Article
Offer more healthier options instead of fries, like salads, and offer milk for Happy Meals
McDonald's in the United States
They want families to have healthier lifestyle because obesity is a growing problem in America
"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.