science

• MIXTURES ARE MADE UP OF TWO OR MORE SUBSTANCES THAT ARE PHYSICALLY COMBINED
• HOMOGENOUS MIXTURES HAVE ONLY ONE PHASE OR HAVE UNIFORM APPEARANCE THROUGHOUT AND ANY PORTION OF THE SAMPLE HAS THE SAME PROPERTIES AND COMPOSITION.
• HETEROGENOUS MIXTURES ARE MADE UP OF MORE THAN ONE PHASE OR OF DIFFERENT PARTS AND CAN BE SEPARATED BY PHYSICAL MEANS.
• SOLUTION A HOMOGENOUS MIXTURE OF TWO OR MORE SUBSTANCES IN VARIABLE COMPOSITION
• METHODS IN SEPERATING MIXTURES FILTRATION EVAPORATION SUBLIMATION DISTILLATION DECANTATION CRYSTALLIZATION USE OF SIEVES AND MAGNETS
• PURE SUBSTANCES element and compound
• mixtures heterogeneous and homogeneous
• types of solution solvent and solute
• filtration process glass funnel filter paper filtrate and solid residue
• seperating mixtures evaporation
• a mixture of two compounds can be seperated by sublimation
• the vapors continue into the condenser
• condenser causes the temperature of the vapor to decrease (GAS - LIQUID)
• glass rod to help in decantation
• crystallization is a process which seperates a pure solid in the form of its crystals from a saturated solution
• sieves is a device containing tiny holes and seperates wanted elements from unwanted material
• matter is anything that has mass and takes up space
• matter is made up of tiny particles called atoms
• matter is anything that has a mass and a volume
• five different types of matter: solid, liquid, gas, plasma, and Bose-Einstein Condensate
• solid has a definite shape
• liquid matter that will take the shape of any container it is placed in put has a fixed volume
• gas does not have a fixed shape or volume, but will completely take up all the space in the container
• most gases are invisible
• suspension a mixture of two substances, one of which is finely divided and dispersed in the other
• properties of matter: characteristics features qualities or traits
• three states of matter solid liquid and gas
• types of changes physical and chemical
• physical change when matter changes its property but not its chemical nature
• chemical change when matter becomes something completely new. New matter is formed
• melting point is the temperature at which it changes state from solid to liquid
• boiling point is the temperature at which the vapor pressure of a liquid equals the pressure
• odor is caused by one or more volatilized chemical compounds that are generally found in low concentrations
• color is the visual perceptual property
• taste sensation of flavor perceive in the mouth and throat
• solubility ability of a substance , the solute, to form a solution with another substance, the solvent
• insolubility the inability of the solute to form a solution
• density is a physical property of matter that expresses a relationship of mass to volume
• density also affected by the atomic mass of an element or compound
• hardness is the ability of a material to resist deformation