Chemical & physical properties 8th Grade Science.
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Transcript of Chemical & physical properties 8th Grade Science.
![Page 1: Chemical & physical properties 8th Grade Science.](https://reader030.fdocuments.us/reader030/viewer/2022033105/56649dc95503460f94abf4d2/html5/thumbnails/1.jpg)
Chemical & physical properties8th Grade Science
![Page 2: Chemical & physical properties 8th Grade Science.](https://reader030.fdocuments.us/reader030/viewer/2022033105/56649dc95503460f94abf4d2/html5/thumbnails/2.jpg)
Everything is made of chemicals. There are 92 natural chemicals or elements. They are arranged on the periodic table. Each element is composed of extremely small particals called atoms.
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All atoms of a given element are identical. Atoms of different elements have different properties. Each chemical has predictable properties that distinguish or separate it from other chemicals.
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The properties of matter can be grouped into two categories: physical and chemical properties.
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Physical properties... Describe what a substance is like or it’s ability to change in some way but it still stays the same molecule.
• Examples:
color
density
odor
melting point
boiling point
hardness
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• What are some physical properties of vinegar?
smell its a liquid clear taste bitter
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Chemical properties...
describe an object/substances’ ability to change into something new. We use these properties to distinguish chemicals from one another.
Ex: Flammability & Reactivity
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•Some examples of chemical properties are...
paper burns
iron rusts
silver doesn’t react w/water
nitrogen doesn’t burn
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•In each of these, the substances chemical property is its tendency to:
react
tarnishcorrode Explode(bubbles,Smell)
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Physical vs. chemical properties
• WoodPhysical Property:
grainy texture
Chemical Property
•Flammable
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PHYSICAL VS. CHEMICAL PROPERTIES
Baking SodaPhysical Property:
white powder
Chemical Property
•reacts with vinegar to produce bubbles
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Chemical vs. physical properties
IronPhysical Property:
Malleable (able to be shaped)
Chemical Property
•Reacts with oxygen to form rust