1. Problem:
How to separate a mixture of sand, table salt, iron filings & sunflower seeds?
Techniques:
Magnetism- use a magnet so separate iron from a mixture.
Filtration- use a paper filter to separate undissolved solids which are floating or in the water body.
Decantation- Carefully pour the liquid away leaving the solid at the bottom of the container.
Vaporization- Use to separate a solid which is dissolved in a liquid (boiling the liquid).

2. Lab: Separation of Mixture:
PROBLEM STATEMENT: How could we separate a mixture of …. ?
HYPOTHESIS: If we use correct techniques, then we can separate a mixture.
INDEPENDENT VARIABLE: The methods used.
DEPENDENT VARIABLE: The components of a mixture (separated).
CONSTANTS: The equipment used
(balance).