Physical Science Resources

Intro to Energy and Energy Resources



This episode defines energy and introduces the different energy resources.

Topics covered in this video:

0:00 – 0:26:
– Introduction
0:27 – 4:46 (end)
– Definition of energy
– Different kinds of energy
– Energy transformations
– Efficiency
– Energy resources are found in all spheres of the earth (geosphere, biosphere, hydrosphere, atmosphere, cosmosphere)

Renewable and Sustainable



This episode overviews some not-so-familiar energy resources, as well as renewable and sustainable resources.

Topics covered in this video:

0:00 – 0:24:
– Introduction
0:25 – 3:16
– An overview of energy resources
– Hydroelectric Power (rivers, water)
3:17 – 4:17
– Waves (driven by winds)
– How does it work?
– Where is it useful?
4:18 – 7:30
– Tides
– Possibility of underwater tidal energy farms
– Why not use them yet?
7:30 – 8:56
– Geothermal energy
– Where are these resources highest?
– Volcanoes, fault lines
8:57 – 12:45
– Renewable and sustainable resources
– Perpetual, renewable, and non-renewable
– Which energy sources are perpetual?
– Rate of natural replenishment vs. rate of consumption
– Defining sustainable

Energy Consumption History & Trends



This episode explores the history of human energy consumption and modern trends in energy consumption.

Topics covered in this video:

0:00 – 5:06:
– Introduction
– History of humans and energy sources
– sunlight and photosynthesis
– energy sources needed
– how fossil fuels changed the economy
– Bar graphs of: – total energy use by all humans by era
– energy use per person by era
– types of energy sources used over time (wood, coal, petroleum, etc.)
5:07 – 7:39
– Petroleum: description – hydrocarbons
– crude oil
– natural gas
– link between fossil fuels and climate
– combustion
7:40 – 8:41
– use of petroleum by humans over the last few millenia
– natural petroleum seeps
8:42 – 11:21
– U.S. consumption of energy sources in kWh
– global comparisons of energy use and oil consumption
11:22 – 16:08
– U.S. energy sources, use, and purposes
– Percent of energy from renewables, fossil fuels, etc.
– dependence on fossil fuels
– energy lost