Unit 6 Fossil Fuels And Electricity. Technology Flashcards
How were fossil fuels formed on land?
Fossil fuels were formed in the Earths crust millions of years ago. They are a source of energy that comes from plants and animals that were once living. When the sand, mud and rocks hardened, they compressed the dead plants and animals. The pressure and the heat were so strong that they were able to change the once living plants and animals into fossil fuels, such as coal, oil and natural gas.
How were fossil fuels formed in the ocean?
When microscopic plants and animals died, they fell to the ocean floor forming layers of rich mud mud. Over millions of years these layers of mud were compressed by soil, sand , stones and rocks and turned into oil and natural gas. Fossil fuels are sometimes found near the surface of the earth. The oil and natural goes moves upwards through cracks in the earths crust. These fossil fuels are easily collected and used
Why are coal mines so expensive?
Because they have to pay the mine workers, to buy mining equipment and to fix the current equipment
Why is the cost of transport expensive?
It is expensive because they have to grasp or the coal to power stations and they have to pay for the fuel
The cost of power stations
Building a new power station costs billions of rands. The biggest power stations are Medupi in Limpopo and Kusile in Mpumalanga will cost between R116 and R158 billion. By 2926 Eskom will spend about a trillion rand on electricity in SA
The cost of pylons, substations and wiring
To get electricity to our homes, pylons , substations and wires criss cross our country from the one end to the other. This grid system costs money , not only to construct but also to maintain
What is electricity power measured in?
In watts
What can you do to save electricity
Yo can turn the heating element on the geyser down or install a solar water heater or a geyser blanket
