Matter - SOL 2.3

Study Guide

Important Concepts
1.  All common substances are made of matter.
2. Matter is anything that has mass and takes up space.
3.  Mass is a measure of the amount of matter.
4.  Volume is the measure of the amount of space occupied by matter.
5.  Matter usually occurs in three states:  solids, liquids, and gases.
6.  Matter can change from one state to another.  Matter can change from a solid to a liquid to a gas.
7.  When matter changes from one state to another, these changes are referred to as physical changes.
8.  Changes from solid to liquid to gas require heat energy.
9.  Some examples of gases include air (made up of a mixture of gases), oxygen, steam, smoke, and helium.
 
Property a characteristic of matter (for example, visible or invisible.)
Some properties of solids:
  • have their own shape
  • are visible
  • take up space and have weight
Some properties of liquids
  • do not have their own shape
  • take the shape of their container
  • can change shape
  • can be poured
  • take up space and have weight
Some properties of gases
  • have no definite shape
  • take the shape of their container
  • are often invisible
  • have weight and take up space
Changing States of Matter:
*Solid to a liquid done by heating called melting
*Liquid to a gas done by heating called evaporation
* Gas to a liquid done by cooling called condensation
*Liquid to a solid done by cooling called freezing