Phase Changes
Going from solid to liquid is called
melting
What is a property
Something that describes matter
When a substance changes into one or more NEW substances it is a
Chemical change
Matter that always has the exact same composition and properties is a
(Pure) substances
What is matter
anything that has mass and volume
When condensation happens energy is
taken away
What are the 2 types of properties
Chemical and Physical
Breaking glass, shredding, folding, melting, chopping wood, cutting hair are all examples of
Physical change
A substance that can't be broken into anything smaller is a
Element
What are the two categories of pure substances
Elements and compounds
Law of conservation of Energy
Energy can't be created or destroyed
Materials ability to allow heat to flow is called
Conductivity
What type of change can be reversed
Physical change
Kool aid is a what kind of mixture
homogeneouse/solution
Matter is defined as anything that occupies space and has
Mass
Law of conservation of mass
Mass can't be created or destroyed
Density over 1 the objects will
Sink
A substance produced in a chemical reaction is called
A product
What are the 3 classifications of mixtures
Solutions, suspensions, colloids
No definite shape with definite volume is a
liquid
What are the 3 states of matter
Gas, liquid, solid
True or false: Discovering which of two materials can scratch the other is a way to compare the hardness of materials
True
Change in state of matter and change in size or shape is
evidence of a physical change
compound
A phase change from solid to gas is called
Sublimation