natural resources: substances that come from earth examples metals (ex. gold & copper) for...
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Scarcity- As demand increases, supply can decrease, depending on the availability of the item This can cause an increase in pricesTRANSCRIPT
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Natural resources: substances that come from Earth
EXAMPLES Metals (ex. Gold & copper) for
jewelry, coins, construction, etc Nonmetals (ex. Halite & graphite) for
food, pencil lead, jewelry, glass Fossil Fuels (coal, petroleum) for
heating, power plants, fuels, medicines, plastics
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Scarcity- As demand increases, supply can decrease, depending on the availability of the item
This can cause an increase in prices
![Page 4: Natural resources: substances that come from Earth EXAMPLES Metals (ex. Gold & copper) for jewelry, coins, construction, etc Nonmetals (ex. Halite](https://reader036.vdocument.in/reader036/viewer/2022062412/5a4d1b117f8b9ab05998f70c/html5/thumbnails/4.jpg)
Recycling is a way to meet our needs and save resources while reducing the amount of trash that must be disposed of
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Renewable resources: can be replaced after they have been used
Examples: trees and, in general, freshwater (excludes desert areas)
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Nonrenewable resources: after they are used, they cannot be replaced for millions of years if at all
The resource may be used faster than it is replaced
Examples: gold and copper, iron, aluminum, and fossil fuels
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Fossil Fuels: coal, oil and natural gas, which were formed millions of years ago from the remains of ancient organisms
Scientists estimate that we will run out of coal within 200 years
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Alternative Energy Sources: other sources of energy to replace fossil fuels
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Solar energy: Pros:a.plentiful b.provide heat, hot water and
generate electricity Cons:a.amount of sun varies with the time of
day and seasonsb.more expensive than fossil fuels
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Geothermal energy: comes from heat within Earth that can be used to generate electricity and produce heat and hot water
Problems: it’s only available in certain areas such as northern California and Iceland
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Wind Turbines: Uses energy from the wind to make electricity
Problem: only makes sense in areas where there are strong, steady winds.
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Hydroelectric power: Captures the energy from flowing water
Problems: dams may break or cause backup flooding
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Nuclear energy: generates electricity without causing air pollution
Cons: a.extremely dangerousb.need for long-term storage of
radioactive wastes. c.Might be a target or radioactive
resource for terrorists