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Changes in matter

Changes in matter. Physical and Chemical Properties Physical and Chemical Changes Observable Features of Chemical Reactions. Physical properties. used to identify substances used to classify substances used to determine effective building materials. Examples of physical properties.

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Changes in matter

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  1. Changesinmatter Physical and Chemical Properties Physical and Chemical Changes Observable Features of Chemical Reactions

  2. Physical properties • used to identify substances • used to classify substances • used to determine effective building materials

  3. Examples of physical properties • Elasticity • Hardness • Durability • Texture • Shape • Boiling point • Freezing point • Melting point

  4. Chemical Properties • used to identify substances • used to classify substances • used to determine effective building materials • used to determine materials suitable in different environments

  5. Examples of chemical properties • Flammable • Non-flammable • Reacts with water • Doesn’t react with water • Corrosiveness • Toxicity • Combustibility

  6. Physical change • Physical changes………. • are concerned with states of matter • are concerned with energy • form no new substances • include changes in states of matter • Same beginning & ending materials

  7. Examples ofphysical changes • Crushing a can • Melting an ice cube • Breaking a bottle • Boiling water into steam • Forming clay into a sculpture Physical

  8. Chemical change • Chemical changes………. • happen on a molecular level • make new substances • have indicators that change has taken place • Different beginning & ending materials

  9. Examples ofchemical changes • Burning logs in a fire • Cooking an egg • Rusting an iron pan • Mixing soda with vinegar • Exploding fireworks Chemical

  10. Evidence ofchemical changes • Change in color • Change in odor • Energy given off (light, heat, sound) • Gas given off • Precipitate forms

  11. Reaction typesinvolving heat Exothermic reactions (heat is given off) Endothermic reactions (heat is taken in) Boom! Fizz!

  12. Chemical change rates • Rates are affected by…………. • Heating • Cooling • Stirring • Crushing • Concentration

  13. Conservation of matter • Matter – can’t be created or destroyed • Mass – can’t be created or destroyed

  14. Changes in matter • Matter has physical and chemical properties. • Matter can change physically & chemically. • Energy is involved in the changes. • Chemical reactions have observable features. • Matter is conserved in a chemical reaction.

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