National & Global Energy Resources (AQA GCSE Physics Combined Science): Flashcards
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3 reasons energy use patterns changed
3 reasons energy use patterns changed
Population growth, technology development, electrical energy use
World population growth in last 200 years
World population growth in last 200 years
From 1 billion to 7 billion people
What is exponential growth?
What is exponential growth?
Rate of increase gets faster over time
How energy use growth compares to population growth
How energy use growth compares to population growth
Energy use has grown faster than population
Average person's energy use trend over time
Average person's energy use trend over time
Average person now uses more energy than in the past
Main energy source before 1900
Main energy source before 1900
Biomass, especially wood
Main energy sources after 1900
Main energy sources after 1900
Fossil fuels (coal, oil, natural gas)
Additional energy sources in recent years
Additional energy sources in recent years
Nuclear power and hydroelectric power
When total energy use increased dramatically
When total energy use increased dramatically
Since 1950
Type of resources coal, oil, and gas are
Type of resources coal, oil, and gas are
Finite resources (non-renewable)
What using more fossil fuels creates
What using more fossil fuels creates
More carbon dioxide in the atmosphere
Environmental consequences of increase
Environmental consequences of increase
Global warming, extreme weather, flooding, food problems
Why we can't keep using fossil fuels forever
Why we can't keep using fossil fuels forever
They will run out and cannot be replaced