Changes in matter Physical and Chemical Properties

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Presentation transcript:

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 Elasticity Hardness Durability Texture Shape Boiling point Freezing point Melting point

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

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

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

Examples of physical changes Crushing a can Melting an ice cube Breaking a bottle Boiling water into steam Forming clay into a sculpture Physical

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

Examples of chemical changes Burning logs in a fire Cooking an egg Rusting an iron pan Mixing soda with vinegar Exploding fireworks Chemical

Evidence of chemical changes Change in color Change in odor Energy given off (light, heat, sound) Gas given off Precipitate forms

Reaction types involving heat Exothermic reactions (heat is given off) Endothermic reactions (heat is taken in) Boom! Fizz!

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

Conservation of matter Matter – can’t be created or destroyed (Atoms remain the same but rearrange) Mass – can’t be created or destroyed (The amount of matter stays the same)

Cellular respiration This is the opposite equation of Photosynthesis

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.