3I. Understanding our Environment Which of the following pictures qualify as an environment? Why or why not?
4B. Environmental Science – The study of how ______humansinteract with the environment.What is the main goal of environmental science?Solve environmental problems by studying the interaction of humans and the environment.II. Fields of studyEnvironmental science incorporates many disciplines:EcologyBiologyEarth SciencePhysicsChemistrySocial ScienceEconomics
5Bellringer/Section 2 Notes Economists value the environment at 33 trillion dollars (that’s $33,000,000,000,000). Make a list of 5 services that the Earth’s ecosystems provide.
7I. The Tragedy of the Commons areas of land that belonged to a whole village.Short term strategy – use resources w/out sharing.Why?People thought that if they didn’t use the resources, someone else would.Results – no resources for anyone.
8What is the benefit of doing this? Commons were replaced individually owned fields.What is the benefit of doing this?Over use meant destroying your own field.What are the “commons” of today?
9II. Economics and the Environment Supply and DemandThe greater the demand, the more it’s worth.
11Demand for oil increases what happens? Pay higher pricesUse less oilFind new energy sourcesIII. Costs and BenefitsBalances the cost of action against the expected benefits.Example:Industry – The cost of pollution control is too expensive.Community – The benefit is worth the cost.
12Developed vs. Developing Countries A. Developed –Higher average incomeExamples:U.S.A.CanadaJapanKoreaSlower population growthDiverse industrial economiesStronger social support systems
13B. Developing –Agricultural based economyExamples:AfghanistanHaitiRapid population growth
14C. Population Pressures Populations increase rapidly resources aren’t available.2. Food production cannot keep up with the pop. growth.3. Little to no government support.
15Your teacher has given you the following assignment: Investigate the impact on plant growth of adding various amounts of fertilizer to potted plants. Think about what you would need to do to be certain that the fertilizer was having the impact on the plant growth. Then answer the items below.Place a Y besides items that would be part of your plan to investigate plant height and fertilizer. Place a N besides items that will not help you investigate this particular connection.a. __ Put one plant in a sunny windowsill and one in a dark corner.b. __ Give plants the same amounts of water.c. __ Give different plants different amounts of fertilizer without keeping track of which plant got extra fertilizer.d. __ Use some new plants from seeds and some old plants that have been growing for months.e. __ Start with plants that are the same size.f. __ Keep all plants in a similar location.g. __ Carefully note amounts of fertilizer each plant is given.h. __ Keep one plant fertilized but with no water.2. Name at least five tools or supplies will you need to perform this experiment
17I. The Scientific Method A. The ______________ is a way to solve problemsscientific methodB. Scientific Method Steps1. Observe2. Ask a Question3. Research/Collect Data4. Form aHypothesisa. Hypothesis -A possible answer5. Experiment (test hypothesis)6. Draw conclusion
18II. The experimentA. Experiments contain VARIABLES – a factor that can change.B. There are 2 types of variables:1. Independent variable – variable that is changed by the scientist.2. Dependent variable – Variable that changes as the independent variable changes.C. Experiments also contain:1. Controls: a standard of comparison2. Constant: things that DO NOT change in an experiment.
19III. Making a graphIndependent variable – variable plotted on the x-axisDependent variable – variable plotted on the y-axisLinear graph – plots make a straight line.
21Research and collect data 1. Ask a question 4. Observation2. Draw Conclusion 5. Research and collect data3. Form hypothesis 6. ExperimentResearch and collect dataAsk a QuestionObservationForm hypothesisDraw ConclusionExperiment