Assesment Revision Flashcards
Population numbers…
Change over time and our influenced by births, deaths and migration into and out of the area.
The world’s population has…
Increased over time and it is estimated that the world’s population will continue to increase in the future.
What are the problems with ageing?
- Pressure on health care
- A need for care homes
- More pensions needed
- Fewer economically active
- Less tax as there are less people to pay tax
What are the problems with youthful populations?
- More schools needed
- In the future, these children will be parents leading to more strain on health services
- Fewer people working
- Less tax as there are less people working and therefore less people paying tax
How do governments manage the population?
Governments have to manage their countries and populations if they become too big or small or if they have too many old people and too many young people.
China- anti-natalist
- Too many young people
- Introduced the One Child Policy
- Fined people who had more than one child
- Some women were sterilised
- Childcare were offered to couples who only had one child
Singapore- Pro-natalist
- Not enough children and too many elderly
- Helping single people find a partner by providing social opportunities
- Paid child before working parents
Electricity…
Is a very convenient form of energy that can be generated using different energy resources.
What is renewable energy?
Renewable energy is energy that is infinite and will never run out.
What is non-renewable energy?
Fossil fuels are non-renewable because they will run out one day.
Examples of non-renewable energy;
Coal
Oil
Gas
Examples of renewable energy;
Hydroelectric energy
Wind power
Solar power
Geothermal energy
Fossil fuel-
A fossil fuel is a natural fuel formed by the remains of pants or animals.
Sustainability-
Meeting the needs of the present without compromising the ability of the future generations to meet their own needs.
Global warming-
A gradual increase in the overall temperature of the earth’s atmosphere because of an increased level of carbon dioxide and other pollutants.
Advantages of Fossil Fuels:
Fairly easy to find
Reliable
Generate a large amount of energy
Disadvantages of Fossil Fuels:
Carbon is given off which causes Global warming
They will eventually run out
Harmful to the environment
Advantages of renewable energy:
Supply is infinite
No harmful gases
Sustainable forms of energy are generated
Disadvantages of renewable energy:
Wind turbines are unsightly
Big cost
Cannot be used in every environment
The rich north…
Consume a large amount of fossil fuels. They have the money for renewable sources.
The poor south…
Use natural materials such as wood to generate energy.
The Greenhouse Effect;
- Solar energy from the sun passes through the atmosphere
- Some energy is reflected outer space
- Earth’s surface id insulated by the sun and radiates the heat back out towards space
- Greenhouse gases in the atmosphere trap some of the heat
Acting sustainably means…
Taking care of the amount of resources to save the beings in the future
Individual actions
Walking, cycling, taking the bus, recycling waste products, switching off electrical appliances after use
National/ Global actions
Reduce oil by using non-petrol cars
Insulating homes
Building more wind farms
Solar panels worth less
