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Chemistry

Chemistry. Study of Matter Matter- anything that has mass and volume. Examples of matter any substance that has mass and volume. Book Cells Desk Pen You air. - Elements and Atoms. The Building Blocks of Matter. Matter may consist of elements, compounds, or mixtures.

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Chemistry

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  1. Chemistry Study of Matter Matter- anything that has mass and volume

  2. Examples of matterany substance that has mass and volume • Book • Cells • Desk • Pen • You • air

  3. - Elements and Atoms The Building Blocks of Matter • Matter may consist of elements, compounds, or mixtures.

  4. All matter can be described as having physical and chemical properties p.537 • Properties are qualities or characteristics • Physical properties are things that can be observed just by using the five senses • Chemical properties describe how the substance will react (combine) with other substances to form a new product

  5. Physical Properties • Can be observed with five senses • Color • Taste • Odor • Texture

  6. Other unique physical properties • Density (mass/volume) • Physical state: solid, liquid, gas • Boiling point (temperature at which the substance goes from a liquid to a gas) water’s boiling point is 100 • Melting point (temperature at which the substance goes from a solid to a liquid) water’s melting point is 0 (below zero, water is solid/ice, above zero, water is liquid) • Solubility (how well the substance dissolves in water

  7. Examples of physical changes • Change in size of substance • Glass is broken • Paper is torn • Water boiling

  8. Chemical Properties p.537 • Chemical properties describe how one substance reacts (changes) into another substance. • Examples of chemical changes • Burning wood • Rusting iron • Milk souring • Note: Chemical changes are usually permament

  9. Physical or chemical change? • Ripped paper? • Physical • Sharpening a pencil? • Physical • Dynamite exploding? • Chemical • Digesting food? • Chemical

  10. Physical or Chemical Change? • Wood burning? • Chemical Cutting iron? Physical

  11. In conclusion • All matter have both physical and chemical properties. These properties make the substance unique (different) from all other substances. • The physical properties of a substance are those that can be observed using the five senses. • The chemical property of a substance describes its ability to change into another substance.

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