properties of matter - weebly
TRANSCRIPT
Properties of matter are categorized as either: Qualitative or Quantitative
Qualitative - Properties that are not measured or have a numerical value. Example: Colour, odour, texture
Quantitative – Properties that are measured and have a numerical value associated with them. Example: Mass, boiling point, height
Physical properties are descriptions of a substance that can be used to identify it. Most physical properties are observed using one of your five senses:
Feel - mass, volume, texture Sight - colour Hear Smell Taste
Luster - How shiny a substance is.
Ductility - The ability of a substance to be drawn into thin wires.(ductile or not ductile)
Optical Clarity – The ability to allow light through an object.
Viscosity – the ability of a substance to flow or pour easily.
Crystal form- The way the bulk forms of the substance appears on close examination
ShinyDull
Brittleness/Malleability – the break-ability or flexibility of a substance.
Conductivity- the ability of a substance to allow the flow of energy or electricity.
Hardness - how easily a substance can be scratched.
Melting point/Boiling point – temperature at which there is a change of state
Texture - how the substance feels/looks on its surface. eg smooth, coarse, rough
Solubility - does it dissolve in water?
State - is it a solid, liquid, or gas?
Physical vs. Chemical Physical properties: observe without changing the identity of the substance
Chemical properties: observed only when the substance interacts with another substance. (changes its identity). How do you know if it is chemical or physical?
If it CHanges , it’s CHemical
Chemical properties are behaviours that occur when one substance interacts with another to become a new substance.
Chemical Properties:Chemical Properties:
Combustibility: Catch fire and burn in air. Terms combustible, incombustible
What is a Chemical Change?
A change in a substance or substances, that produces one or more new substances.
5 ways to tell a chemical change has taken place:
• Colour change
• Gas formed (sometimes as an odour)
• Burning (heat or light)
• Precipitate formed (a solid appears in a liquid)
• Change in Temperature (heat or cold)