Chemistry revision

Pictures. ,[object Object],[object Object]

The Atmosphere ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Nitrogen = 78% Oxygen = 21% Argon = 1%

Questions. ,[object Object],[object Object],[object Object],[object Object]

Fossil Fuels ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chemical Reactions. ,[object Object],[object Object],[object Object],[object Object],NO atoms disappear during a chemical reaction. Reactants and products are usually have very different properties. Burning a hydrocarbon. Methane + Oxygen Carbon dioxide + Water

Finnish this reaction. hydrogen Carbon oxygen + Methane Oxygen. Carbon dioxide water

Air Pollution – Carbon ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Match. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Air Pollution – Sulfur ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Acid rain causes lakes to become acidic, killing plants and animals such as fish. It also kills trees, and damages buildings and statues made from limestone or chalk.

Questions. ,[object Object],[object Object],[object Object]

Air Pollution – Nitrogen. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],NITROGEN OXIDES ALSO FORM ACID RAIN. ( NITRIC ACID) NOx

Reducing Pollution. ,[object Object],[object Object],[object Object],[object Object],[object Object],From Cars . Use more efficient engines that produce less waste. Use low-sulfur fuel. Catalytic converters. Public Transport.

How do these pictures relate to reducing pollution.

Natural and synthetic materials. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Questions. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Materials and Properties. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Materials, properties and uses. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Cooking utensils must be made from something with a high melting point and be non toxic. A toy car must be non-toxic and should be strong, stiff and have a low density.

Questions. ,[object Object],[object Object],[object Object],[object Object],[object Object]

Crude oil and chemical synthesis. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Crude Oil: petrol,naptha, diesel, lubricating oil .

Polymerisation. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Structures and properties of Polymer. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Recycling Elements. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Into soil Out of soil Lightening Nitrogen fixing bacteria in the soil. Plants Denitrifying bacteria.

Organic and Intensive Farming. ,[object Object],[object Object],[object Object],[object Object],[object Object],Harvesting crops removes elements from the soil. When plants are taken to be sold, nothing is returned to the soil, this causes problems. Nitrogen , Phosphorous and Potassium are lost. This means over a period of time no plants will be able t grow there. The way farmers replace the soil depends on whether their farms are organic or intensive .

Questions. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pest Control ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Natural Polymers. ,[object Object],[object Object],[object Object],[object Object],[object Object],Carbohydrates. They consist of carbon, hydrogen and oxygen.

Digestion. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Questions. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Insulin and Diabetes . ,[object Object],[object Object],Type 1 Type 2 The pancreas STOPS making insulin. This means sugar can not be removed from the bloodstream. A high blood sugar level could result in a coma or death. However it can be controlled by insulin injections and controlling diet. The symptoms develop gradually and they include weight loss, needing to wee more often and tiredness. Types 2 stops the body from making enough insulin or the body stops responding to insulin. Both of these things are linked to poor diet and obesity. Type 2 an be controlled by diet, loosing weight and exercising. Sometimes insulin is taken.

Harmful Chemicals in food. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Some foods contain chemicals left over from farming. Pesticides and herbicides used in farming can be present in small amounts on fruit and veg. Washing and peeling them would get rid of these.

Food Additives. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Questions. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chemistry revision

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