Tag Archives: energy

Economic Activity and Energy Revision Guide

Topics

  1. Economic sectors
  2. Informal vs. formal sector unemployment
  3. Changing location of tertiary and quaternary sector
  4. Global shift in manufacturing
  5. Deindustrialisation
  6. Energy demand
  7. Renewable and nonrenewable energy sources
  8. Energy efficiency
  9. Planning fieldwork

Key terms

  • Types of industry sector (e.g. types of manufacturing industries)
  • Types of energy
  • Types of sampling techniques
  • HIC, LIC, MIC
  • Factors affecting industrial location
  • Energy production, consumption, energy gap
  • Questionnaires

Case Studies

Deindustrialisation: South Wales

Reindustrialisation: Location of Nissan car manufacturing plant in Sunderland

High-tech industry: M4 Corridor

 

 

 

 

 

 

Economic Activity and Energy Revision Checklist

  1. Economic sectors definitions, examples, LICs and HICs
  2. Informal sector vs formal sector employment characteristics, examples, advantages and disadvantages
  3. Changing location of tertiary and quaternary sectors
  4. Global shift in manufacturing TNCs (more profit by locating their factories on cheap land), transport (faster and cheaper so distance from raw materials/markets is less of an issue), communications (faster and more efficient – contact with factories abroad), energy (national grid systems to provide electricity, which manufacturing relies on), governments, footloose industries
  5. Deindustrialisation 
  6. Energy demand/supply and the energy gap
  7. Renewable and non-renewable sources advantages and disadvantages of each
  8. Energy efficiency arguments for and against, ways to be efficient
  9. Planning fieldwork good vs bad questionnaires, sampling technique (minimizing bias, random vs stratified), sample size (how many people surveyed), data presentation, conclusion (trends, anomalies), evaluation (quality of questionnaire/sampling technique/data/presentation method etc)

Case studies:

  • South Wales (deindustrialisation)
  • M4 Corridor (high-tech industry)
  • Nissan car assembly plant in Sunderland (re-industrialisation)
  • HIC and LIC (decentralization of service industry)

Case Study: Deindustrialisation (South Wales) and High-Tech Industries (M4 Corridor)

Deindustrialisation: South Wales

South Wales has experienced both growth and decline as an industrial area.

During the 19th Century Southern Wales became a vitally important industrial area, for both iron and steel production. The steep valleys, with their fast flowing rivers, provided power and transport. The hills were rich with raw materials, such as coal, iron ore and limestone, and the area was close to the ports of Cardiff and Swansea.

In 1860 there were over 30 iron works in the valleys of South Wales. They provided vital employment for the local villages, which became almost solely dependent on the new industries.

During the next 40 years improvements in the smelting process, meant that the production of iron was replaced by steel manufacture, which was more profitable.The natural resources needed were the same.

By the 1990’s only two steelworks were left in South Wales, and both of them were on the coast. The resources had run out, only one coal-mine remained working and the many small works in the valleys had closed down, causing huge social problems.

The new works were integrated steel works, which imported their raw materials from abroad. These aimed to make the industry more efficient and competitive in a growing world market. Not only is there competition form other countries but also form other materials that are increasingly being used instead of steel. Materials, such as aluminium and plastics.

An example of one is the integrated steel works at Port Talbot. Opened in 1954, it is an integrated steelworks, which is one in which all processes of the steel making industry occur under one roof.

The coal and iron ore deposits of South Wales have long since run out or become too costly to get at, so both of these raw materials are imported from places such as Africa and South America.

Port Talbot has many locational advantages. There is a large area of flat land, near to the sea for importing and exporting purposes. Near by is a large workforce and access to the entire British market through the excellent motorway links. It has created employment opportunities in the area, and has encouraged further investment and growth.

South Wales is experiencing something of a recovery again, thanks to being at one end of the M4 Corridor. Industrial Parks have been established outside of the main cities, to benefit from the large workforce,good transport links and available land.

There have also been government grants and loans made available to encourage industrial location in the area. Companies such as Sony, Bosch and Toyota have all re-located to South Wales.

Hi-tech industry: The M4 Corridor

New industrial regions in Britain have tended to grow up along main communication routes. The best example of this is the “Sunrise Strip”, which takes in the area around motorways such as the M11, M23, M3 and, most importantly, the M4.

These industries are described as being footloose. They have generally grown up over the last 25 years in “growth areas”, along communications routes. Although they do bring prosperity to regions, the new industries actually employ few people in comparison to the older, declining, heavy industries. Traditional location factors have been super-seeded by newer ones.

As access to raw materials is relatively unimportant nowadays, location, although dominated by communications considerations, also can increasingly take into account the social needs of its employees. Thus climatic, scenic, health and entertainment factors have to be included. In turn the industries try to locate near to places where a skilled workforce could be employed, such as around the university towns of Oxford or Cambridge.

The Sunrise Strip has many locational advantages:

  1. The motorway system, which allows easy access to all parts of the United Kingdom.
  2. Easy access, via the roads, to the Channel Tunnel and ports to allow export abroad.
  3. The close proximity of Heathrow, Gatwick, Stanstead and Luton airports, all of which could be used to export products.
  4. The skilled workforce found in university towns of Oxford, Cambridge, Reading and Bristol.
  5. Close proximity and good access to London, where the major government functions and financial trading occurs.
  6. The concentration of other industries means that ideas and knowledge could be shared, there will be a concentration of suitable skilled labour and transport costs may be reduced between agglomerated industries.
  7. A very attractive natural environment, which would provide a very pleasant place to live for the workers. Areas such as the Cotswolds and the Mendip Hills are in easy reach of the Sunrise Strip.

Two other good examples of similar new industrial areas are:

1. Silicon Glen in Central Scotland.

2. Silicon Valley in California, USA.

Breathing, Respiration and Gas Exchange

1. Breathing the process of getting oxygen into the lungs and carbon dioxide out of the lungs

  • Allows for gas exchange whereby oxygen is absorbed from an area of high concentration (alveoli in lungs) into an area of low concentration (red blood cells) and carbon dioxide is absorbed from an area of high concentration (blood plasma) into an area of low concentration (alveoli in lungs) by diffusion

respiratory-system

Inhalation Exhalation
Intercostal muscles contract Intercostal muscles relax
…which moves ribcage up and out ….which moves ribcage down and in
Diaphragm contracts -> moves down Diaphragm relaxes -> moves up
 volume of thoracic cavity ->U+2193.svg pressure -> air enters lungs to equalize pressure  U+2193.svg volume of thoracic cavity ->↑ pressure -> air exits lungs to equalize  pressure
  • Pleural membranes and pleural fluid are slippery to reduce friction during breathing movements

How are alveoli adapted for gas exchange?

Feature  Function
Thin (one cell thick) Short diffusion distance
Large surface area Large volumes of gas can diffuse at once
Moist Keeps cells alive
Well ventilated (constant fresh supplies of air) Maintains concentration gradients for oxygen and carbon dioxide
Close to a blood supply Efficient transport of gases to/from cells

2. Respiration the process of releasing energy through the breakdown of glucose in all living cells

Aerobic respiration Anaerobic respiration
Requires oxygen Does not require oxygen
Glucose + oxygen -> carbon dioxide + water + energy
C6H12O6 + 6O2 -> 6CO2 + 6H20 + 2900kJ/mol (kilojoules per mole of glucose)
(In plants)
Glucose -> carbon dioxide + ethanol + energy
(In animals)
Glucose -> lactic acid + energy
Produces a lot of energy Does not produce a lot of energy
Involves mitochondria Does not involve mitochondria

Breathing and exercise

When we exercise…

  • rate of breathing
  • depth of breathing
  • heart rate

…to deliver more oxygen and glucose to the muscles faster and remove carbon dioxide 

breathing_n _exercise

  • Before, during and after exercise, an unfit person usually has a higher pulse rate than a fit person
  • After exercise, a fit person recovers much faster than an unfit person

Respiratory diseases

Chemical What it is Long term effect on the body
Nicotine Highly addictive drug
  • Affects the CNS and brain
  • Makes the heart beat faster
  • Narrows blood vessels
  • Causes heart disease
  • Raises blood pressure
  • Stomach ulcers
  • Stomach cancer
  • Lung disease
Tar
  • Brown substance that collects in the lungs
  • Contains thousands of chemicals, some of which are carcinogens.
  • Mouth, lips, throat and lung cancer
  • Smoker’s cough
  • Bronchitis
  • Pneumonia
Carbon monoxide
  • Poisonous gas
  • Taken up by the blood instead of oxygen.
  • Reduces the body’s capacity to carry oxygen as carbon monoxide combines with haemoglobin more easily than oxygen,
  • Deposits fats in arteries which can lead to a heart attack or stroke
  • Poor circulation can lead to gangrene and limb amputation
Irritants and toxic substances
  • Chemicals
  • Effects the respiratory tract
  • Causes bronchitis
  • Poor health
  • Reduced energy