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Unformatted text preview: Chapter 4 States of Matter Section 4­1 Solids Quiz next class on Sec. 4­1 Everyday, water changes from a How can we solid to a liquid to a explain this? gas and back again Let’s do a quick review of what you already Let’s do a quick review of what you already know: Matter has three states: 1. Solid 2. Liquid 3. Gas Matter is anything that takes up space and has mass. More review More review Most matter is made up atoms and molecules. An atom is the smallest particle that makes up a given element of matter. When two or more atoms combine, they make a particle called a molecule. Examples of molecules Examples of molecules O H H H Liquid O Water NGas N Nitrogen H C H HCO Glucose OC H Solid Blood sugar H H CO HC OH HCH O H ??? ??? Why is water a liquid, nitrogen a gas and glucose a solid? What makes a solid a solid? a liquid a liquid? a gas a gas? One clue to this mystery was first reported in 1827 by scientist Robert Brown – – Brownian Motion Under a microscope, dust particles can be seen t...
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