1st parcial exam 9th Flashcards
(31 cards)
A substance made out of two or more simpler substances that can be Brocken up to simpler ones
Compound
There 2 types of Compounds
heterogenous and homogenous
They tend to have remains of their original substance
Mixtures
Mixture can be classifies as based on their particles
Suspensions, solution or colloid
What is a suspension
heterogenous mixture with layers that separate over time
What is a colloid
It has particles in intermediate size
Solution
something that dissovlves
What is a physical property
a characteristic that can be observed or measured
Types of physical properties
Viscosity
conductivity
malleability
melting point & boiling point
density
Common separations methos
Distillation and filtration
What is filtrations
procces to separate the particles
what is distillation
process to separate the substances in a solution
When does a physical change occur
when some properties change
what is a chemical property
change in the composition of matter
What is flammability
how it can burn in the Prescence of air
the main gases in the air
nitrogen and oxygen
what is a chemical change
change i color
production of gas
and formation of precipitation
materials can be classifies as
solids liquids and gases
what is a solid
a material that has a definite shape
What is a liquid
the same shape as its contaner
What is gas
It has neither definite shape nor volume
what is a phase change
a substance changes from one state of matter to another
Common phase changes
Evaporation , melting, freezing , deposititon, condesation, and sublimination
what happens during a phase change
energy is transfered between a substance to its surroundings
