8th Grade
Boiling point is the temperature in which the substance
boils.
The boiling point of water is
usually 100˚ Celsius.
Condensation Point is the temperature in which a gas becomes a
liquid.
Dew
condenses
from water
vapor in the
air.
A pure substance is matter that always has exactly the
same composition; an element or compound.
Quartz –
Silicon
dioxide is a
compound
A compound is a substance that is made
from two or more simpler substances and
can be broken down into those simpler
substances.
Filtration is the process that separates materials based on the size
of their particles.
A solution is a mixture that forms when
substances dissolve and form a
homogenous mixture.
When sugar is poured in a glass of
hot water, and stirred up, the sugar
eventually dissolves into the water.
Filtration is the process that separates materials based on the size of their
particles.
A physical property is any characteristic of a material that can be
observed or measured without changing the composition of the
substances in the material.
Ice
Melting Point
Water
Physical change is a change that occurs when some properties of
a material change, but the substances in the material stay the
same.
Malleability is the ability of a
solid to be hammered without
shattering.
A chemical property is any property that produces a change in the
composition of matter.
Flammability is a material’s ability to burn in the presence of
oxygen.
A precipitate is a solid that forms and separates from a liquid
mixture.
Deposition is the phase change in which a gas or vapor changes directly into a solid
without first changing into a liquid.
When water vapor hits a colder surface, like
glass it will turn into frost.
Sublimation is the phase in which a solid changes directly into a
gas without becoming a liquid.