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PS Chapter 2:Matter

Leach Physical Science Chapter 2: Matter

QuestionAnswer
What is matter? anything that occupies space and has mass
What is the name of the current model that explains the structure of matter? the kinetic-molecular theory
What particles make up an atom? protons, electrons and usually neutrons
What is a molecule? a particle made from two or more atoms bonded together
Like solids, liquids are nearly __________. incompressible
Gases and liquids are both __________ which is why they can both be brought into your house through pipes. fluid
A "state" of matter depends on what two factors? the strength of the attraction between particles (how far they are apart) and how fast the particles are moving (related to temperature)
What "doesn't" change in a substance during a physical change? the chemical composition of a substance
Which kind of property of matter helps us distinguish between pure water and a strong liquid acid like nitric acid? by their chemical properties (specifically, their corrosiveness)
Is the Kevlar fiber's strength a physical property or chemical property? it's a physical property that comes from it's molecular structure even though it's polymerized molecular chains are a chemical property
How does the speed of atoms or molecules in a substance relate to its temperature? on the average, the faster the particles of a substance are moving, the higher its temperature (as well as the reverse)
What type of energy does a substance gain or lose when its temperature changes thermal
Where in a liquid does "evaporation" occur? at the surface of a liquid
The temperature at which a solid turns into a liquid is called it's __________. melting point
The temperature at which a liquid turns into a solid is called it's __________. freezing point
This statement: Matter can neither be created not destroyed, but only changed from one form to another is called __________. Conservation of Matter
__________ is a type of vaporization that happens when certain kinds of solids seem to "evaporate" as molecules enter the vapor state without becoming a liquid first. Sublimation
The opposite of vaporization is ____________ which occurs when a vapor cools and changes to the liquid state. condensation
When talking about a mixture, if the particles are evenly mixed and about the same size we call that a __________ mixture. homogeneous
When talking about a mixture, if the particles differ "greatly" in size and you can see the different particles like in Italian dressing we call that a __________ mixture. heterogeneous
Created by: CoachLeach