Renewable & Nonrenewable Resources 3/21/18 Ms. Harper Biology

March 22, 2018 Begin working on Do Now You will receive your quiz grades back at the end of class.

Do Now 1/11/16 1. How do you think you did on your quiz Friday? 2. What are some things you can do to improve/maintain this grade for next time? 3. What is the difference between biotic and abiotic factors? 4. Give an example of both abiotic and biotic factors. 5. What is carrying capacity? 6. Name at least three limiting factors in the environment. 7. Explain the difference between density- dependent and density-independent limiting factors.

Human Impact & Natural Resources UNIT 5

Humans Change the Environment Humans are a major part of every ecosystem in which they live. The human population like other organisms can continue to grow until it reaches its carrying capacity. This may have increasingly harmful effects on ecosystems, but we can do something to minimize this damage.

Natural Resource A natural resource is a product of the environment that is used by humans or other organisms. Can you think of any examples of natural resources? Write down at least two.

Renewable Resource A renewable resource is a resource that can be replaced through natural processes. Possible Characteristics Can regrow Can be reused Replaced fairly quickly

Examples of Renewable Resources Air/Wind Soil Water Trees Sunlight

Nonrenewable Resource A nonrenewable resource CANNOT be replaced by natural processes at least not as fast as they are used. May never be reused or May take millions of years to reform Includes all fossil fuels

Examples of Nonrenewable Resources Coal Oil Natural Gas Metals (copper, iron) Marble

Commonalities Between Renewable and Nonrenewable Resources Both are resources Both come from the environment Both support human life and other living things

COMPARE & CONTRAST

Human Activities & the Environment Biology Mrs. Harper 3/22/18

Do Now 1/12/16 What is a natural resource? What is a renewable resource? What are some examples of renewable resources? What is a non-renewable resource? What are some examples of nonrenewable resources? What are some traits renewable and nonrenewable resources have in common?

Conservation & Sustainable Development Conservation- the wise use of natural resources Examples: recycling, reducing resource use Sustainable development- using enough resources to meet needs without destroying or depleting resources for future generations

Desertification Desertification- changes productive, fertile land into a desert Caused by misuse of land in dry ecosystems through overplanting and overgrazing Negative effects: fewer species can live there, lack of nutrients, possible erosion Positive effect: can be reversed, soil can be replenished

Desertification

Deforestation Deforestation- clearing of forests by humans Forests moderate temperature, help create balance between oxygen and carbon dioxide Negative effects: destruction of habitats, decreased soil fertility, less oxygen Positive effects: can be reversed through planting seedlings, wood used for construction, furniture and paper

Deforestation

Overfishing Overfishing- harvesting (collecting) fish faster than the population can renew its numbers There are laws that place limits on the number of fish that are caught Negative effects: disrupts food chain, possible extinction of species Positive effects: provides abundant food for humans

Overfishing Overfishing- harvesting (collecting) fish faster than the population can renew its numbers There are laws that place limits on the number of fish that are caught Negative effects: disrupts food chain, possible extinction of species Positive effects: provides abundant food for humans

Overfishing

Pollution- Burning Fossil Fuels Pollutants are released through the burning of fossil fuels in power plants, factories and vehicles. This increases atmospheric carbon dioxide which causes temperatures to rise all over the world (Global Warming) Causing glaciers to melt and eventually polar ice caps Sea levels will rise and coastal cities may be found underwater

Global Warming

Pollution- Acid Rain Coal burning releases nitrates and sulfates into the atmosphere These chemicals mix with water vapor to produce acid rain Acid rain can injure or kill trees, plants, fish and insects

Pollution- CFCs Chemicals called CFCs found in aerosol cans, refrigerators and air conditioners damage the ozone layer when released into the air Ozone layer is important because it partly blocks UV radiation from the sun.

Water Pollution Run-off from paved areas carries oils, gasoline, pesticides, fertilizers and sediment which pollutes our clean water supply. Industrial waste and human sewage also pollute freshwater We must not use any more water than is necessary to protect the supply for future generations

Video (if time) https://www.youtube.com/watch?v=pZ9jsQa dfoU At the bottom of your notes, list some harmful human activities that you observe in the video. We will discuss these as a class.