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Physical and Chemical Properties & Changes

Physical and Chemical Properties & Changes. Mrs. Hooks 6 th Grade Science. Physical Properties. Physical Properties- any characteristic that can be observed or measured without changing the identity of the object. Observations are made using your 5 senses Sight Hearing Touch Smell

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Physical and Chemical Properties & Changes

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  1. Physical and Chemical Properties & Changes Mrs. Hooks 6th Grade Science

  2. Physical Properties • Physical Properties- any characteristic that can be observed or measured without changing the identity of the object. • Observations are made using your 5 senses • Sight • Hearing • Touch • Smell • Taste- NO NO!! Do not taste in labs!! • Matter- anything that has mass and takes up space.

  3. Physical Properties continued…. Physical Properties (ob- observable, m- measured) • Color (Ob) • Size (ob) • Shape (ob) • Length (ob/m) • Mass (ob /m)- the amount of matter in an object • Volume (ob/m)- the amount of space an object takes up • Density- (ob/m)- the amount of mass a material has in a given volume D=M/V

  4. Physical Properties Continued…… • 8. State of matter (ob)- depends on its temperature and pressure. Solid, liquid, gas, and plasma • 9. melting point (ob/m)- the temperature at which a solid becomes a liquid • Temperature at which a solid becomes a liquid is 0 ° Cwater • 10. boiling point (ob/m- the temperature at which a substance in the liquid state becomes a gas. • Temperature at which a liquid becomes a gas 100°Cwater

  5. Metallic Properties Physical properties of metals • Luster • Malleability- ability of some metals to be hammered, pressed, or rolled into thin sheets • Ductility- ability of some metals to be drawn into wires.

  6. Physical Change • The physical properties of a substance change, but the identity of the substance does NOT change. • Ask yourself 2 Question…… 1. Is the substance still the same thing? YES 2. Can I change it back? YES THEN IT IS A PHYSICAL CHANGE!!!!

  7. Dichotomous Key • A tool used to determine the physical properties or characteristics to determine the identity of a specimen and classify them.

  8. Measurements • Massgram • Densityg/cm³ • Length centimeter, meter • Volumecm³

  9. Chemical Properties • Chemical property- any characteristic that gives a substance the ability to undergo a change that results in a new substance • Flammability • Reacts with oxygen • Reacts with water • Reacts with light

  10. Chemical Change • A change in the identity of the substance due to the chemical properties of that substance. Ask yourself 2 Question…… 1. Is the substance still the same thing? NO 2. Can I change it back? No THEN IT IS A chemical CHANGE!!!!

  11. Here’s your sign! • If you observe one of these things, chances are it is a Chemical Change! • Bubbles • Production of heat • Production of light • Smoke • Change in color (can be either P or C) • Production of sound Chemical Change

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