Flash Animations for MATTER, Change of State (phase) and Measuring learning
 Change of state                           Measurement           P, V, T Mixtures                 Practice Questions

 content   MIXTURES AND PURE BODY   The water in our environment   Omnipresence of water in our environment. Water, drinks and a constituent of living organisms. Recognition test of the water.       Aqueous mixtures  Homogeneous and heterogeneous mixtures. Separation of some components of aqueous mixtures. Examples of heterogeneous constituents of beverages. Existence of the gas dissolved in water. The recognition test of carbon dioxide in lime water      Homogeneous mixtures and pure body.   Water, homogeneous mixtures. Presence in a mineral substances other than water. Obtaining water (almost) pure by distillation.         State changes of water, phenomenological approach  First approach to the states of matter. Specific properties of each physical state. State changes are invertible. Water cycle. Mass measurements, unit, the kilogram (kg). Volume measurement, unit, per cubic meter (m3). Distinction between mass and volume. Conservation of mass during state changes and not the volume conservation. Locating a temperature, unit: degree Celsius (° C). Existence of a temperature plateau during a change of state for a pure substance.    Water : solvent   Water is a solvent of some solids and some gas, it is miscible with some liquid. Conservation of total mass during a dissolution. Vocabulary of dissolution: the notion of saturated solution is limited to a qualitative approach.   Air composition   Dioxygen, forming air with nitrous.   The oxygen necessary for life.     Volume and mass of air.   Character of a compressible gas. Mass of a given volume of gas.     A molecular description to understand   A first particle model to interpret the compressibility of a gas. Distinction between mixed and pure body for air and water vapor. The existence of the molecule. The three states of water through the molecular description: - A gas is dispersed and disorganized; - The liquid state is compact and disordered; - Solid state is compact, crystalline solids are ordered. Interpretation of mass conservation during state changes and in mixtures.