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Properties and Changes of Matter

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Tara Hutchcroft

on 7 April 2011

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Transcript of Properties and Changes of Matter

Properties and Changes of Matter Physical Property: Any characteristic of a material that can be observed or measured without changing the identity of the material Matter: Anything that has mass and takes up space Physical change: the physical properties of a substance change, but the identity does not Length
Mass: amount of material in an object
Volume: amount of space an object takes up
Density: amount of mass a material has for a given volume; D=m/V Density can change if temperature or pressure change States of Matter Solid, Liquid, Gas, Plasma Melting and Boiling Points Metallic properties Substances Matter that has the same composition and properties throughout Elements: only one type of atom
Compounds: fixed ratio of atoms throughout; can be broken down by chemical means only! Mixtures Homogeneous Mixtures (Solution): "the same throughout", e.g., sugar water, air, brass (zinc and copper)
Heterogeneous Mixtures: can see different parts, e.g., pizza, toolbox Homogeneous Heterogeneous Chemical Properties and Changes Flammability Reacts with oxygen Reacts with light Reacts with heat Chemical property: any characteristic that gives a substance the ability to undergo a change that results in a new substance
Chemical change: a change in the identity of a substance due to the chemical properties of that substance; a new substance or substances are formed in such a change In Summary....
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