Importance Of Energy
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What is energy?
The ability to make “things” happen.
What is primary industry?
Extracting raw materials
Give 2 examples of primary industry.
Agriculture, Fishing, Mining and Water
Give 2 examples of why energy is needed in agriculture.
Haber process to produce fertiliser Machinery
Give 2 examples of why energy is needed in fishing.
Power boats Processing fish caught.
Give 2 examples of why energy is needed in mining.
Blasting overburden Machinery
What is secondary industry?
Manufacturing products
Why does secondary industry require energy?
For heating or for electricity
Give 2 examples of secondary industries and why they require energy.
• Water- for treatment and desalination • Mining- for electrolysis
What is tertiary industry?
Services- e.g. education and retail
What is quaternary industry?
IT and information
Which types of industry have the highest demand for industry?
Primary and secondary
Apart from industry, name 2 other reasons we require energy.
Personal life and transport
What phrase do we use instead of “per person”?
Per capita
How can energy per capita change if incomes increase.
More products bought, more transport, energy usage increase.
Explain how energy per capita changes if the cost of energy decreases.
People use more energy, per capita energy increases.
Explain how energy per capita changes if there is less primary industry.
Energy usage decreases, as less energy intensive processes occurring.
Explain how energy per capita changes if there is more government legislation.
Energy usage decreases, as increases efficiency of appliances.
Explain how energy per capita changes if there is more environmental awareness.
Energy usage decreases, as people are aware of the impacts of their energy use.
Explain how energy per capita changes if temperature increase.
Energy usage increases, as people use air conditioning.
Explain how energy per capita changes if temperatures decrease.
Energy usage increases, as people use heating
Give 3 reasons why it is difficult to predict future energy usage per capita.
Don’t know if there will be changes to… 1.Incomes 2. Energy prices 3. Government legislation 4. Environmental awareness 5. Linked to global climate change
What is the unit of energy?
Joules or J
Convert 1 kJ to Joules.
1 kJ = 1 000 J