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Published byJoella Walsh Modified over 9 years ago
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Why does AIR have matter? Observe Matter Questions Was anything in the cup besides the paper? If so, what was it? Feel the paper towel, is it dry or wet?
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Matter What is it?
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Matter is … The amount of MASS in an object and the amount of space an object takes up (VOLUME).
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What Matter is not… Light & Heat Anything that does not take up space.
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Physical States of Matte r
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Solid Has definite shape and definite volume Examples …
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Liquid It will fill up the shape of a container and has definite volume. Example …
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Gas Fills a container of any size or shape. Example …
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What about Plasma? Not normally found on Earth; similar to gas Example Northern Lights Ball Lightning Fluorescent light bulb
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Physical Properties What are they?
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5 Senses Anything that we can identify with our five senses – except SMELL & TASTE WHY? Smell and taste use chemical receptors in the mouth and nose
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Measurements Any size or shape… Size, Volume, Area, Diameter, Radius, Mass, Density, Length, Shape, Temperature, …
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More Properties… Melting Point– point at which matter melts. Freezing Point. – the point at which matter freezes. Boiling Point. – the point at which matter boils.
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Metallic Properties Magnetic attraction – the attractions between metals. Malleability – ability TO BE hammered into thin sheets. Ductility – ability TO BE drawn into thin wires. Luster - shiny ; reflective
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Chemical Properties Any characteristic that gives a substance the ability to undergo a change that results in a new substance
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Chemical Properties Flammability (able to burn) Ability to react with oxygen Ability to react with acids
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Law of Conservation of Matter Matter is neither created nor destroyed. It only TRANSFORMS. For Example
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Wood + Oxygen Ash + Gases + Water
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Physical Change When a physical property is changed but the matter remains the same
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It’s a physical change if… It changes shape or size It dissolves. Some can be changed back
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Examples Water boiling Glass broken Sandpaper on a piece of wood Etc…
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Change in the identity of the substance Chemical Change
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NaHCO 3 + CH 3 COOH CH 3 COO - Na + + H 2 O + CO 2 Sodium bicarbonate and vinegar => Sodium acetate and water and carbon dioxide Heat is released Baking Soda + Vinegar
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It’s a chemical change if…. It burns Temperature changes without heating/cooling
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It’s a chemical change if... It bubbles (makes a gas) Reacts with acid
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It’s a chemical change if... It changes color It forms a precipitate (a solid)
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It’s a chemical change if... Corrosion (Rust or Oxidation)
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What kind of change is it if someone... Tears up paper? Physical change Mixes salt and water? Physical change
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What kind of change is it if someone... Burns paper? Chemical change Evaporates salt water? Physical change
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How is a burning candle both?
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