Addictional Applied Science

Intensive Farming

• Pestisides - Stop pests and weeds.
• Animals in confined spaces - eg. Battery Hens.
• Using fertillisers to boost growth of crops.

Organic Farming

• Natural fertilliesers - eg. Manure.
• Free range animals.

• Food poisoning occurs when a food has become contaminated with a disease causing bateria to grow.
• Good hygiene - STOPS food poisoning.

Bacteria needs 5 things to grow

• Warmth
• Moisture --------------> Main 3 Things
• Food Source
• (Suitable atmosphere)
• (Suitable Ph)

• Carbohydrates -- Sugar -- Starch ---> Energy.
• Protein ---> Growth & Reapair.
• Fat ---> Energy & Storage of Energy.
• Vitamins --- > Different Body Processes.
• Minerals ---> Different Body Processes.
• Fibre ---> Add Bulk To Food
• ---> Pass Through Your Gut.
• Water ---> Keeps You Hydrated

What Foods?

• Carbohydrates -- Sugar ---> Chocolate, Sweets.
• -- Starch ---> Pasta, Bread.
• Protein ---> Meat, Fish, Eggs.
• Fat ---> Butter, Chocolate.
• Vitamins ---> Fruit -- Vitamin C.
• Minerals ---> e.g -- Iron -- Spinach.
• Fibre ---> Wholegrain e.g -- Brown Rice.
• ---> Nuts.

<----------- Postive and Negative Compounds Attract.

Find them by Chemial Tests OR Flame Test.

Compounds.

• Have a High Melting Point.
• Disolve In Water.
• Made Up Of Charged ION's.

Chromatography.

• Place a sample on the paper with a pencil line.
• Place the chromatography paper in the solvent, with the dot above the solvent level.
• Allow time to soak.

Sodium ---> Yellow

Cooper ---> Blue/Green

Potassium ---> Lilac

Calcium ---> Brick Red

How To Find A Fingerprint.

• Find the fingerprint of the object.
• Lightly brush over the fingerprint with carbon powder.
• Place see-through tape over it, and peel off.
• Place the tape onto plane paper.

How To Make A Footprint Impression.

• Make a cardboard cutout so the impression fits within the frame.
• Add water to the plaster of paris.
• Pour the Mix onto the impression.
• Allow it to set.
• Analyse the impression once soild.