Science Third Quarter

• Matter - anything that has mass and volume, and occupies space
• Density - amount of mass in a given volume. (dm³)
• Malleability - The ability to be pounded into thin sheets
• Ductility - The ability to be drawn or pulled into wire
• Solubility - The ability to dissolve in another substance.
• Thermal Conductivity - The ability to transfer energy from one area to another.
• Chemical Property - describes a substance based on its ability to change into new substance with different properties.
• Flammability - The ability to burn or ignite.
• Combustibility - Burns when heated in the presence of Oxygen.
• Reactivity - Oxidation
• Physical Change - Change that affects one or more physical properties of a substance. This forms new substances and can be often undone.
• Chemical Change - Change that occurs when one or more substances are changed into entirely new substances with different properties. This can not change back under normal conditions.
• 5 Signs of Chemical Change - Odor Production, Change in Temperature, Change in Color, Formation of Bubbles, Formation of a Precipitate.
• Intensive Property - does not depend on the amount of substance
• Extensive Property - dependent on the amount of matter being measured.
• Solid - fixed shape, fixed volume, incompressible, packed closely in orderly arrangement, very strong forces of attraction, particles vibrate and rotate about fixed positions.
• Liquid - No fixed shape, fixed volume, incompressible, packed closely in disorderly arrangement, strong forces of attraction, particles can move and exchange positions within the liquid.
• Gas - no fixed shape, no fixed volume, very compressible, far apart in an disorderly arrangement, weak forces of attraction, particles are in random motion.
• The Kinetic Theory - all matter is made up of extremely small particles that are in constant motion. These particles can be atoms, molecules, or ions.
• Melting - solid to liquid. Absorbs heat.
• Freezing - liquid to solid. Releases heat
• Condensation - gas to liquid. Release heat
• Evaporation - liquid to gas. Absorbs heat
• Deposition - gas to solid. Release heat
• Sublimation - solid to gas. Absorbs heat