How much stuff is inside an object. We measure it with a scale in grams (g). Think: how heavy does it feel?, mass, How much space an object takes up. For today’s experiment; a cube, multiply side × side × side. , volume, How tightly the stuff is packed into the space; mass divided by volume., density, An observable or measurable characteristic of an object., property, (from latin “qualis” what kind) a description using your senses (words, not numbers). Examples: color, shine, rough or smooth, smell, hard or soft., qualitative Property, (from latin “quantus” how much) measurable properties using numbers and units; like mass, in grams (g), volume in centimeters (cm³) - for solid objects, in milliliters (mL) - for liquids, in degrees Celsius °C - for temperature., quantitative Property, (from Latin conducere, meaning “to lead together.”) Examples: a metal wire that allows electricity to pass through it; a cooking pan that allows heat to pass through it., conductivity, An object or substance that has mass and volume., matter, A property of a material that measures how well heat energy can pass through it., thermal conductivity, The amount of a material that can dissolve in a liquid (solvent)., solubility, A property of a material that measures how well electrical energy can pass through it., electrical conductivity, A material that conducts electricity, heat, or sound poorly., insulator, A material’s surface that partially reflects light so it has a sheen, or gloss., luster, A force that can attract or repel objects such as iron or steel., magnetism, Tiny pieces of something. (small portions of matter), particles, A property of a material that describes how well light or sound bounces off its surface., reflectivity, A connection between two or more things., relationship, Material that can dissolve., soluble, Separated into smaller pieces., subdivided, Any change in an investigation that can affect the result., variable, State of matter where particles move freely and are far apart; a gas fills the shape and the entire volume of its container (no fixed shape), gas, When particles in a liquid get enough energy to escape into the air as a gas., evaporation, how particles spread through the room, diffusion, In a scientific experiment (investigation), the one thing you change to test its effect. (In our shadows investigation we changed the time of day. In the Music effects on heart rate, we changed the type of music), independent variable, In a science experiment (investigation), the thing you measure or observe that changes because of the independent variable. (In our shadows investigation, we measured the length of the shadow. In the Music investigation, we measured the heart rate., dependent variable, In a science experiment (investigation), all of the things you keep the same so the test is fair, controlled (constant) variables.

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