Chemical and Physical Properties Quiz

Chemical and Physical Properties & Changes

• Learning Goal: Investigate materials and describe their physical or chemical characteristics. Describe changes in material properties due to common physical and chemical reactions.
• Physical vs. Chemical Properties: Physical properties describe characteristics that can be observed or measured without forming a new substance. Chemical properties describe how a substance reacts with other substances to form new substances.
• Examples of Physical Properties: Color, size, odor, hardness, density, luster (shine), state of matter (solid, liquid, gas, plasma), melting point, boiling point, viscosity, solubility, electrical conductivity, heat conductivity, texture, taste, smell, crystalline structure, malleability, ductility.
• Examples of Chemical Properties: Reacts with water, reacts with air, reacts with acids, reacts with oxygen, reacts with pure substances, toxicity, stability, combustibility, acidity.
• Quantitative vs. Qualitative Properties: Quantitative properties can be measured, like mass or volume. Qualitative properties describe characteristics, like color or texture, that cannot be measured.
• Physical Changes: No new substance is formed. Changes in state (e.g., melting, solidifying, sublimating, evaporating, condensing), size, or shape are examples.
• Chemical Changes: A new substance with new properties is formed. The original substance reacts with something else, and atoms break apart or form new bonds.
• Indicators of Chemical Changes: Heat produced or absorbed, new color, light produced, disappearance of a starting color, formation of new material, gas bubbling, precipitate forming (solid in a liquid).