Matter Tree

1
Matter Tree

• Matter anything that has mass and takes up
  space
• Pure substance only 1 kind of matter
• Elements all the same atoms (smallest part of
  an element)
• Compounds two or more elements chemically
  combined (smallest part is molecule)

2
Element or compound?
Elements chlorine, iron, gold
Compounds salt, copper chloride, sugar
3
Matter Tree

• Mixture two or more substances which keep their
  same properties (not chemically combined)
• Heterogeneous particles not uniform through
  out, can see different parts
• Suspension mixture contains large particles,
  which settle out (e.g. salad dressing)
• Homogeneous particles uniform throughout, can
  not see different parts
• Solution one substance dissolved in another
• Alloy mixture of two or more metals

4
Heterogeneous or Homogeneous?
heterogeneous
homogeneous
5
Suspension, solution or alloy?
6
Properties

• Physical observed without changing the
  substance
• e.g. color, shape, density, mass, volume,
  melting point, boiling point, solubility
  (dissolves)
• Chemical describes how a substance reacts
• e.g. flammable, reactivity (chemically
  combines with something)
• changes the substance into something new

7
Properties

• Some properties depend on how much of the
  substance is there
• Mass, volume, shape
• Many properties do not depend on the amount
  present. These are called characteristic
  properties.
• density, state of matter, melting point, boiling
  point, reactivity, solubility

8
Changes of Matter

• Physical substance stays the same, (you can get
  original back using normal means)
• e.g. change shape/size, change of state,
  dissolving, mixing
• Chemical substance changes and new one(s) form
  (cant get back using normal means)
• Clues change in color or smell, temperature,
  fizzing, makes noise, light