SEPARATING MIXTURES.

What everyday items can you think of that need to be separated and what are the processes used to complete these separations?

SIEVING…..

DECANTING….

water supply-upper layer taken for use after sedimentation

MAGNETIC SEPARATION…

SEPARATING ORES FROM MINED EARTH.

GRAVITY SEPARATION…SEPARATING ORES

GOLD PANNING

EVAPORATION….

SALT FROM SEA WATER…

FILTRATION….

DIESEL FILTRATION

AIR FILTRATION

HEINEMANN INTERACTIVE P76

water supply cleaned of impurities, wine making-remove skin

Separating TechniquesUse pages 75 & 76 in the text book to fill in the table

Technique Name Definition Examples in real life

Sieving Used to separate small chunks of ore from larger ones.

Sifting flour, separating pasta from water when cooking

Decanting Water supply-upper layer taken for use after sedimentation

Sand in water

Magnetic separation

SEPARATING ORES FROM MINED EARTH.

At the tip

Gravity separation When you separate materials because one is heavier than the other

Gold digging

Evaporation

Filtration Separate small particles from a liquid

Now turn to page 82. Answer in sentences Q1, 2 and 4 (turn back to p 75/6 or the table above)

DISTILLATION….

make perfumes from plant materials, petrol oil

CHROMATOGRAPHY….

Separate colours in food dyes, pesticides in food

Centrifuging….

oil

Wet clothes

Bloodproducts

Uses for Chromatography.• Paints, inks dyes and food colourings are often mixtures of

substances that have different colours. These can be separated using paper chromatography.

• Can detect very small amounts of harmful pesticides in foods• Detect drugs in urine• Separate complex chemicals found in cells of living things• Check composition and purity of chemicals used in industry• Used to make and purify chemicals by manufacturers of

medicines.

SEPARATION TECHNIQUES.