the importance of energy supplies in the development of society Flashcards
Historically what was humans principle energy source?
sunlight
how was life limited by sunlight?
tasks could only really be done in daylight hours before darkness
what biofuel allowed for fire?
wood
what is the problem with wood as a energy resources?
small scale energy resources cant be used to power vehicles or factories
what did the discovery of coal allow?
allowed steel to be created and it powere3d the industrial revolution
what does having access to energy allow?
energy=industry=money=development
what is the trend between human development and energy consumption?
the more “developed” a country is the more energy it uses generally
what is affluence
wealth
how does affluence affect energy consumption?
wealthier nations can afford yo do more activities and have more things that use energy
what does energy insecure mean?
a country don’t have their own sources of energy instead they have to import energy from other countries
what is the problem with having energy imported?
Political tensions such as between Ukraine and Russia can lead to boycotts of much needed sources of oil
what also makes a country energy insecure?
A country might have energy resources but not the technology to extract it
what is an example of a place where they have oil but cannot extract it?
Nigeria
what is primary energy?
the raw fuel source
what are examples of primary energy?
coal, oil, gas
what is secondary energy?
an energy source derived from other primary energy sources
what is an example of a secondary energy source?
electricity
what is the problem with converting primary energy to secondary?
the process isn’t efficient and some energy is lost
why does primary to secondary conversion take place if its inefficient?
as electricity is a useful energy source
why does primary to secondary conversion take place if its inefficient?
as electricity is a useful energy source
why is electricity more useful then coal in some cases?
Phones don’t run off coal
where is energy used in Agriculture?
- manufacture of fertilisers and other chemicals
- transporting food
- refrigerating food
- fuel for machinery
- fuel for water pumps
- fuel to light greenhouses
- fuel for milking machines
- larger more powerful fishing vessels
- processing food products
- powering ventilation and heating animal housing
why is energy beneficial for farming?
makes farming easier and harvesting quicker this means that we are more productive
what does more productive farming mean?
more calories or crops can be produced in a smaller space
what are the negatives of intensified farming?
pollution and poor animal welfare and increased carbon emissions
what are the positives of intensive farming?
can provide more food to more people
how is energy used for fishing?
- power large trawler ships
- aeration of tanks in aquaculture
- chilling caught fish
- powering of filtration systems
- transporting fish stocks
- gutting and canning fish
how has energy been beneficial for the fishing industry?
able to fish more from the seas
fish farms are possible as stable conditions can be provided
catch size has increased
processing fish much easier
why is energy important for industry?
industrial revolution was only able to happen due tot he ability to create kiln fires to smelt iron
how is energy used in industry?
- operate machinery (conveyor belts, excavators)
- heat to melt metal and form parts
- energy to induce chemical reactions
- heat for baking (bricks to bread)
- heat to distil products- crude oil to alcohol
where is energy needed for water?
- needed to help in treating water for use
2. energy used to pump water from reservoirs
how is energy used in transport?
- transport of goods- container ships and lorries need diesel
- energy needed to transport energy oil pipes may need heating
- transport for people- cars, planes, trains and busses
why might energy be needed to transport energy?
oil pipelines need to be kept warm so the oil can remain liquid and flow
how is energy used in the home?
- space heating
- cooking
- lightning
- powering appliances (washing machine)
how would domestic life be affected without energy?
would take up more time and effort
what is the global average for energy usage in homes
3,370 kWh
