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define matter Anything that has volume and mass.
define volume Amount of space something takes up.
define mass Amount of matter an object has. it remains constant. (as long as the matter remains constant)
define weight Gravitational force on an object. It changes depend on its location relative to the earth.
1. What is physical property ? 2. What are some examples? -Can be measured or observed without changing the identity of the object. -color,size,shape
what is conductivity? transfer of energy
what is malleability?? when something is pounded into thin sheets
define ductility pulled into thin wire
solubility dissolve into another substance
define density mass per unit d=m/v
what is chemical propety describe a substance based on its ability to change into a new substance with different properties
what are some chemical properties? flammability reactivity
what is physical change? changing a physical property of a substance. It does not change the identity of the substance.
define chemical change process of changing a substance into a new substance. ex. tarnishing,burning, and souring
what is solid? Molecules are very close together. Solids have a definite shape and volume.
define crystalline orderly arrangement of molecules ; repeating ex. ice,diamond,and iron
what order are amorphous molecules in? no particular order ex. rubber,wax, and plastic
what order are liquid molecules in? somewhat close together; changes shape but not volume ; molecules slide past one another to conform to container.
what order are gas molecules in? far apart; changes both shape and volume;
what is boyles law? for fixed amount of gas at a, the volume of a gas increases as its pressure decreases; volume decreases as its pressure increases .....ex.pump
what is charles law? for a fixed amount of gas at constant pressure the volume of a gas increases as the temperature increases; the volume of a gas decreases as its temperature decreases....ex. car tire
what is plasma? no definite shape or volume;molecules have broken apart; conducts electrical currents; ex. lightning,fire, auroras borealis
what is change of state? conversion of a substance from one physical form to another;
what is melting point? solid changes to liquid and molecules gain energy and move faster. endothermic energy is absorbed.
what is freezing? liquid changes to a solid and molecules lose energy. Exothermic change- energy is removed.
give ex. of vaporization boiling(liquid to gas at boiling point), evaporation(liquid to gas below the boiling point).....endothermic charge-energy is absorbed
what is condensation? gas changes to liquid molecules lose energy exothermic change- energy is removed
define sublimation solid changes to gas
what is the density of h20? 1.0 g/cm3
what happens if object is less dense it floats
what happens if object is dense it will sink
Created by: tylerusso