env sci week 22 -...
TRANSCRIPT
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Environmental Science
Tuesday, February 9, 2016
Do-Now:“8.2QuizReview”1. Writedowntoday’sFLT
2. Whatdoesthecompe@@veexclusionprincipletellus?
3. Dis@nguishbetweenalion’shabitatandalion’sniche.
4. Diagramwhatapredator-preycyclemightlooklike
(graphically).
5. Listthethreetypesofsymbiosis,provideanexample
foroneofthetypes.
Finished?TakeoutyourplannerandToC.
Annoucements
• NoschoolFriday2/12andMonday2/15
• Allassignmentsshouldbestamped
• Havealowscore?Seemewithyour
quiztoretake
Planner: • ALL stamps!! • Read 9.1 Table of Contents #5 17. 8.2 Quiz Review Do-Now 18. World in the Balance Packet
Standard • HS-LS2-6: Evaluate the claims, evidence, and reasoning
that the complex interactions in ecosystems maintain relatively consistent numbers and types of organisms in stable conditions, but changing conditions may result in a new ecosystem.
FLT • I will be able to compare patterns of human
population growth by completing World in the Balance Packet
World in the Balance
• How do human populations grow? • Which countries grow the fastest? • How long would it take to double each
country’s population?
World in the Balance
• We will look at the population growth rates of various countries around the world • First, you will receive a packet. • I will assign each group different
countries. Write down your countries as I go through them.
Group 1 Countries
• Belize • Argentina • Ireland • Egypt • Gaza Strip • New Zealand
Group 2 Countries
• Nicaragua • Colombia • France • Uganda • Kuwait • Fiji
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Group 3 Countries
• Guatemala • Ecuador • United States • Nigeria • Yemen • Guam
Group 4 Countries
• Honduras • Peru • Luxemborg • Sierra Leone • South Korea • Papua New Guinea
Group 5 Countries
• Anguilla • Venezuela • Norway • Somalia • Saudi Arabia • Tonga
World in the Balance • Use the growth rate handout to write
down the 10-Year Growth Rate for your countries • Then, make a prediction about how many
decades it will take for the population to DOUBLE • Example/ I think Japan will take 10
decades (100 years)
Calculating Growth Rate • Multiply the initial population by the
growth rate à round up and write this number in the number of new individuals column • Add this number to the starting population à write this in the new population size • Write the new population size as the new
starting population in the next row
0.25
0.25 0.25
12.5 à 13 50 + 13 = 63
63 16 79 79
Calculating Growth Rate • Multiply the initial population by the
growth rate à round up and write this number in the number of new individuals column • Add this number to the starting population à write this in the new population size • Write the new population size as the new
starting population in the next row
CW
• Finish Packet • Work on ToC J
Environmental Science
Thursday, February 11, 2016
Do-Now:
1. HaveoutyourPopula@onGrowthpackettoget
stamped
2. Take10minutestocompletetheCh.8StudyGuide
3. Remember:WewillhaveacombinedCH.8&Ch.9
Test2/23
Finished?TakeoutyourplannerandToC.
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Annoucements
• NoschoolFriday2/12andMonday2/15
• Allassignmentsshouldbestamped
• Havealowscore?Seemewithyour
quiztoretake
Planner: • Study notes + vocab • Tues: 9.1 Quiz Table of Contents #5 19. Ch. 8 Study Guide 20. 9.1 Notes 21. Age Structure WS
Standard • HS-LS2-1: Use mathematical and/or computational
representations to support explanations of factors that affect carrying capacity of ecosystems at different scales.
FLT • I will be able to define four properties that scientists
use to predict population sizes by completing 9.1 Notes Part A
9.1 Notes
• Noise level 0 • Copy down all bolded ideas • Raise your hand to question/comment • Be prepared to pair-share
9.1: Studying Human Populations
Recall
Patterns of Population Growth
Demography
Demography • Demography = the study of populations
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Demography • For example, a demographer might study
human behavior, economics, and social structure – anything that influences the overall population
Human Populations
Human Population • The human population grew slowly for
thousands of years until the industrial and scientific revolutions of the 1800s
Human Population • Improvements in food production and hygiene
helped lead to rapid, exponential growth
Human Population • Is this growth sustainable?
Population Characteristics
Which countries contain most of our population? Which type of country grows the fastest?
Forecasting Population Size
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Forecasting Population Size • Demographers study population
characteristics in order to make predictions about the future: – Age Structure – Survivorship – Fertility Rates – Migration
Age Structure • Age Structure = the distribution of ages in a
specific population at a certain time
Rapid growth Slow Growth No Growth
Survivorship • Survivorship = The % of the population that
survives per age group
Survivorship • Type I: Most offspring survive and live a long life
(humans)
Survivorship • Type II: Death rate is constant across age
groups (birds)
Survivorship • Type III: Most offspring die à organisms have
many offspring to ensure some survive (frogs)
Fertility Rates • Fertility Rate = Average number of children a
woman gives birth to in her lifetime
Fertility Rates • Some countries can have relatively low fertility
rates, but continue to grow due to immigration
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Migration • Migration = The movement of individuals from
one area to another
Migration • Immigration = movement into an area • Emigration = movement out of an area
Demographic Transition
Demographic Transition • Populations in most developed countries grow
slowly – why is this?
Demographic Transition • Demographic transition = model that shows
how economic and social changes affect population growth rates
Demographic Transition • Stage 1: Pre-industrial. High birth rates and
high death rates à stable population.
Demographic Transition • Stage 2: Improved hygiene, nutrition, and
education à high birth rates, low death rates. Rapid growth.
Demographic Transition • Stage 3: Low birth rates, low death rates.
Population growth slows.
Demographic Transition • Stage 4: Birth rate continues to drop à
population size decreases.
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Women and Fertility
Women and Fertility • Increasing education & economic
independence for women à lower birth rates.
Pair-Share-Respond 1. Howdidhumanpopula@ongrowthdifferbeforeand
a_ertheindustrialrevolu@ons,andwhy?
2. Whatwouldtheagestructureofarapidlygrowing
popula@onlooklike?
3. Whattypeofsurvivorshipcurvedohumanstendto
match,andwhy?
4. Howcanapopula@onwithalowfer@lityratecon@nuetogrow?
CW
• Complete the age diagram worksheet J • Finished? Work on your ToC or quietly
study • 9.1 Quiz Tuesday J