Download The Particle Model (Topic 1)

Study Guide – Mix and Flow of Matter
The Particle Model (Topic 1)
Mixtures (Topic 2)
Pure Substances versus Mixtures
Elements vs. Compounds
Homogeneous vs. Heterogeneous
Solutes and solvents
Sugar (solute) dissolves in water (solvent).
Why is water considered the universal solvent? What does it mean if something is insoluble?
How can you speed up dissolving (hint: there are four things that can affect the rate of dissolving)
Separating Mixtures (Topic 3)
There are many ways to separate mixtures:
Distillation,
dehydration (or evaporation),
floatation,
magnetism,
sifting
(See handout for greater detail).
filtration,
settling (or sedimentation),
Viscosity, Density and Buoyancy
(Topics 4-6)
These three topics are closely related.
Viscosity
You will be required to calculate density on the unit test.
Buoyancy
You will be required to plot data on a graph and interpret the data.
A Formula for Pressure
Pressure can be calculated by using the following formula:
Pressure (P) = Force (F) / Area (A)
or,
P=F/A
Force is measured in newtons (N)
Area is often measured in square metres (m2)
Pressure is newtons per metre square (N/ m2) - also called a pascal
(Pa), after Blaise Pascal (a french scientist in honour of his pioneering
work in pressure)
1000 pascals is called a kilopascal (kPa)