What is energy? How do we get most of our energy? A composite of many satellite images show light from cities across Earth that is visible from space. ____________________________________: the ability to do work ________________________________ – The amount per person (eg. Energy per capita = the amount of energy each person uses) __________________________________________ – value of all goods and services produced by a country in a year _________________________________________ – how much energy is required per billions of dollars of GDP. (eg. Country with a high energy intensity would use a lot of energy to produce a little bit of goods and services)
13.80 0.753 Compare the energy intensities calculated in question 4. Do these values correspond with the tendency for countries with high-tech economies to have lower energy intensities? Predict the change to ’s energy intensity if farmers introduced techniques that increased crop productivity. Suggest reasons why – a developed country – has a high energy intensity. Calculate the energy efficiency of a water heater that uses 200J of energy to increase the thermal energy of water 55J. If an automobile engine is 20% efficient, calculate the useful output energy from 1kg of gasoline containing 44.5MJ of chemical potential energy.
VIDEO – CANDU REACTOR Questions to answer during video: 1. Compare coal-fired and nuclear power plants Similar Components Similar Processes Unique processes 2. Identify two functions of heavy water in a CANDU nuclear reactor. 3. Explain “deference in 4. Justify the practices used to train nuclear-power operators, including a careful selection of experienced individuals and participation in intensive training programs.
…stimulates a healthy economy, enabling adequate health care …requires a highly trained workforce …requires the workforce to adapt to change through continuous training …reduces excessive land use (e.g., urban sprawl) …encourages per capita energy consumption to be reduced …stimulates a healthy economy, enabling affordable housing …requires co-operation of diverse cultural groups in decision making Total Societal Sustainability Percentage (total indicators  16  100%) Weighted Score (percentage  weighting) Economic Sustainability Weighting = ___ Focus Question: Does the use of the technology result in greater opportunities for employment, economic growth, increased GDP, and optimum locations and scheduling for production? Specific Indicators: This technology… True = 2 Uncertain = 1 False = 0 …supports full-time employment for the population …enables a higher proportion of the workforce to be paid reasonable wages …has a relatively low cost per megajoule (MJ) …enables development of other industry or opportunity …reduces the import of energy, contributing positively to the GDP …enables the export of energy, contributing positively to the GDP …can be used in a variety of locations that are well-suited to industry …allows for continuous, around-the-clock production …does not decrease the availability of natural resources Total Economic Sustainability Percentage (total indicators  18  100%) Weighted Score (percentage  weighting) Overall Score for Technology (Ecological + Societal + Economic) Part A: Geothermal Energy (Pages 530-532)