Unit 6- Matter
Matter-Materia
Change-Cambiar, Cambio
State-Estado
Melting-Derritiendo
Solidification-Solidificación
Vaporization-Vaporización
Liquid-Liquido
Become-Convertir
Boiling-Hirviendo, Ebullición
Evaporation-Evaporación
Condensation-Condensación
Drops-Gotas
Sublimation-Sublimación
Reverse
Sublimation-Sublimación Inversa
Frost-Escarcha
Melting Point- Temperatura de
Fusión
Boiling Point- Temperatura de
Ebullición
Hang Out (clothes)- Colgar
Heat- Calentar
Rise- Subir
Molds-Molde
Pure-Puro
Changes of State
A change in
temperature can cause a change of state in
matter.
These are the changes of state:
Melting. This is when a solid becomes a liquid, like when ice melts and changes to water.
Solidification. This is when a liquid becomes
a solid. It happens at the same temperature as melting.
Vaporization. This is when a liquid becomes
a gas. It can happen in two ways:
Boiling. Vaporization
happens quickly when the substance reaches a
certain temperature. When we heat water, it starts to boil and turns
to water vapor.
Evaporation. Vaporization
happens slowly and at a lower temperature than boiling. For example, water evaporates when we hang clothes out to dry.
Condensation. This happens when a gas
becomes a liquid. Water vapor from the
shower forms drops of water on a
mirror.
Sublimation. This is when a solid becomes a gas without
first becoming a liquid. For example,
solid air fresheners change into a
gas when they mix with the air.
Reverse
Sublimation. This
is when a gas becomes a solid without first becoming a liquid. For example, water vapor in the air turns
into frost.
Every pure
substance changes from a solid to a liquid at a specific temperature, this is
called the melting point. The boiling
point is another specific property of a substance.
Over the years people have learned how to make use of
the changes of state. Melting and
solidification are used to manufacture many objects. Some metals and plastics are heated until
they are liquids. Then they are put into
molds and left to become solid.