env sci week 22 -...

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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