Resources 7-4.6 Classify resources as renewable or nonrenewable and explain the implications of their depletion and the importance of conservation.

X-Rays of a 12 legged frog found in a California Pond

Cause? Acid Rain

Fossil Fuels- Bill Nye (5:44)

Resources Renewable resources Nonrenewable resources can be used and reused naturally cannot be replaced by nature

Renewable Resources How often are renewable resources replaced? Examples Replaced through natural processes at a rate equal or greater than the rate at which they are being used air, freshwater, soil, living things, sunlight

Renewable Resources Air Water Can be cleaned and purified by plants during photosynthesis CO2 in, O2 out Water cycle allows water to be used over and over within the environment Air Water

Renewable Resources Soil Topsoil is formed to replace soil eroded and washed away by water and wind new soil forms very slowly

Renewable Resources: LIVING THINGS PLANTS Trees and other plants grow to replace those cut down or dead ANIMALS Animals are born to replace animals that have died

Renewable Resources Will continue until the sun dies 4-5 billion years from now source of energy for all processes on Earth Sunlight/ solar energy

Energy Sources Fossil Fuels Wind Wood Sunlight

Nonrenewable Resources Why not being replaced? Exhausted: being used and extracted and used at a greater rate that the rate they form Exist in a fixed amount and can only be replaced by processes that take millions of years

Nonrenewable Natural Resources Examples Fossil Fuels Petroleum gasoline (liquid) natural gas (gas) Coal Metals Gold, silver, aluminum, copper, titanium Minerals Diamonds (ancient, pressurized coal) Oil Coal Natural Gas

Conservation Why conserve renewable resources? Why conserve nonrenewable resources? Natural resources can be depleted or used to the point that they are no longer available If they are used at an increasing rate so that they cannot be naturally replaced fast enough, they too can be depleted Nonrenewable resources are known to be a non-replenishing supply

Conservation Soil can deplete land of nutrients? How can freshwater be depleted or unfit for natural use? Soil lost b/c it is left bare of vegetation will erode fertile topsoil needed for plant growth will be missing too high of demand by population wasteful use of water pollution

Conservation How can the depletion of living resources, like trees, affect the ecosystem? Plants that not regrown/replanted can lead to changes in the land, air, and water

making a decision to not use a resource when there is an alternative walking/biking vs driving to conserve fossil fuel (gas) and reduce air pollution Reducing

Alternatives to fossil fuels (60% current use) Solar Nuclear Water (hydrologic) Wind Geothermal Fuels cells (run on H)

Reusing Finding a way to use a resource (or produce from a resource) again without changing it or reprocessing it washing a drinking glass vs disposable cup

Recycling Reprocessing a resource (or product from a resource) so that the materials can be used again as another item metals, glass, plastics remade into new products or fibers

Protecting Preventing the loss of a resource (usually living things) by managing their environment to increase the chances of their survival wildlife preserves for endangered animals

Why are trees considered natural resources? Humans use them to produce paper, lumber, fuel, and other products. They are an important source of firewood for campfires. They grow back after they’re cut down. They provide valuable shade that no other resource can provide Which of these is a factual statement about natural resources? As soon as they’re available, everyone should drive solar-powered cars. Fuel cells are the most important technology we’ve ever developed. Someday, humans will run out of fossil fuels. Using wind energy will make us feel better about ourselves.

Why isn’t glass considered a natural resource? Which is the most likely reason why soil erosion can be a major problem? A region’s agriculture can be destroyed if the soil erodes. Dangerous, radioactive elements exist under the soil. Soil contains expensive minerals. Soil is a non-renewable resource. Why isn’t glass considered a natural resource? It has a limited number of uses. It isn’t used by humans. It’s non-renewable. It’s not found in nature.

What is the key difference between renewable and non-renewable resources? All non-renewable resources pollute the environment; renewable resources do not. Non-renewable resources exist in limited quantities; renewable resources do not. Non-renewable resources exist in unlimited quantities; renewable resources do not. Non-renewable resources must be refined before humans can use them; renewable resources do not. Which of the following is the most sensible way to conserve natural resources? Bike or walk to work instead of taking a gasoline-powered car. Don’t use any products made from trees. Never ride in a car. Stop using electricity entirely.

How does recycling conserve natural resources? Since it’s not in limited supply, solar energy is considered a sustainable energy source. What does sustainable mean? Available to everyone. Capable of being continued long-term. Related to light and heat. Related to the sun. How does recycling conserve natural resources? It allows us to re-process products instead of manufacturing new ones. It prevents garbage from being burned. It saves on the amount of fuel used by garbage trucks. It saves on the amount of plastic used to manufacture garbage bags.

Why is wind energy considered a renewable resource? It can be found in a variety of places. It’s completely non-polluting. It’s unlikely that we’ll run out of wind. The wind can blow incredibly fast.