Card Set Information
What are physical properties?
can be observed without chemically changing matter
What are chemical properties?
describe how a substance interacts with other substances
What type of property is malleability?
What type of property is density?
What type of property is color?
What type of property is shape?
What type of property texture?
What type of property is mass?
What type of property is ductility?
What type of property is conductivity?
What type of property is solubility?
What type of property is re activity?
What type of property is combustability?
What type of property is flammability?
What type of property is acidity?
What type of property is the ability to rust?
What is a physical change?
no change in identity of substance
What is a chemical change?
one or more new substances is created
What is the density of water?
What is the freezing point of water?
0 degrees celcius
What is the boiling point of water?
When does liquid turn to solid?
When does solid turn to liquid?
What two points are the same?
melting and freezing
When does liquid turn to gas?
When does gas turn to liquid?
When does solid turn to gas?
What type of change is acid rain?
What is the law of conservation of mass?
mass cant be created or destroyed
What is an Element?
pure substance made of one kind of atom
What is and element represented by?
one or two letter symbol
What is a compound?
two or more elements chemically combined
What are compounds represented by?
What proportions do compounds combine in?
the same proportions
What is a mixture?
two or more substances physically combined
What proportions do mixtures combine in?
not the same proportions
What is a heterogeneous mixture?
What are homogeneous mixtures
What is an alloy?
solution of two or more metals
What is hydrogen peroxide?
What is carbon dioxide?
What is rust?
What is carbon?
What is steel?
What is lead?
How can the components of a mixture be separated with physical properties?
What is centrifuge?
an instrument that uses density to separate mixtures when tiny solid particles are dissolved in water
What is used to separate liquids and solids?
What is used to separate solutions
An object will float in water if?
its density is less than 1.0
An object will sink in water if?
its density is greater than 1.0
What is the formula for density?
mass divided by volume
What are intensive physical properties?
remain the same no matter how of of the substance you have
What are extensive physical properties?
depend on the amount of substance present
ex- mass, volume, length
What is suspension?
particles will settle out over time
particles are large
can be separated by fileration
What are colloids?
medium sized particles
What is the Tyndall effect?
scattering of light by a colloid
What are examples of suspensions?
What are examples of colloids?
What are Solutions?
constant composition that is uniform throughout
can be solid (alloy), liquid, or gas
What is a solute?
What is solvent?
does the dissolving
What is filtration?
technique that uses a porous barrier to separate a solid from a liquid
What is distillation?
separation based on differences in the boiling points of substances involved
What is crystallization?
separation resulting in the formation of pure solid particles of a substance from a solution
What is Chromatography?
separates the components of a mixture on the tendency of each to travel or be drawn across the surface of another material