SMART board Miss Andrews’ Desk

6Shamena

5Salma

4Dorothy

3Tatiana

2Kiara

1Jimmy

12Martell

11Deshandre

10Stephanie

9Shantiera

8Christian

7Lisa

18Marcie

17Auziauna

16Patricia

15Jorge

14Ashley

13Osmar

24Jamal

23Rasheed

22Erick

21Devon

20Fabian

19Samuel

28Briana

27Richard

26 25

32 31 30 29

Seats: period 1

SMART board Miss Andrews’ Desk

6Abdi

5Noel

4Kiala

3Kaila

2Dominique

1Melodie

12Mary

11Troy

10D’Andrew

9Maria

8Daniel

7Felix

18Andre

17Isaiah

16Noemi

15Luis

14Rosana

13Justine

24Renee

23Jakar

22Tyrone

21Nakerie

20Juan

19Breanna

28Louis

27Edwin

26 25

32 31 30 29

Seats: period 5

Passport“Education is our passport to the future, for

tomorrow belongs to the people who prepare for it today.”

4minute

s!

1. Take your score & divide it by 43 ÷ 4 = 0.75

2. Take your answer & multiply it by 100

0.75 x 100 = 75

3Write in scores & draw bars for exit tickets7.1 & 7.2& clean-up suppliesfor your catalyst stamp!

test reminders

ET Shout Out!

BIG

goa

l = 8

0%

195%

ET Shout Out!

BIG

goa

l = 8

0%

170%

ET Shout Out!

BIG

goa

l = 8

0%

592%

ET Shout Out!

BIG

goa

l = 8

0%

581%

100.B1: Raise a hand1: Demonstrate North Star traits

– Problem solver– Goal driven

3: 100% seated before the bell3: “Ready for your attention” 3: Lab / activity clean up5: 100% on task during practice5: 80% exit ticket average

Headphoneson

Friday!

100.BMonday Tuesday Wednesday Thursday Friday Total / Goal

1: Biology 24 24 / 100

3: Ciencias Fisicas 12 12 /

1005: Biology 22 22 /

1008: Physical Science 26 26 /

10010: Ciencias Fisicas

18 18 / 100

hot seat

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love it or

hate it!

hot seat

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hot seat

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phones!

headphone

s!

headphone

s!

headphone

s!

unit 7: ecology

ObjectivesWe are learning to…

explain how birth, death, immigration, and emigration influence population size

We will be successful when we can…explain how populations grow using both exponential and logistic growth patterns

Agenda

• Passport 5• Quick Check! 5• Limiting Factors

Intro 5• Independent

Practice 10• Group Practice 10• Independent

Practice 10• Exit Ticket 5

sciencegenius!

Quick Check!Which population is

decreasing in size between year 0 and 16?

Which population is increasing in size between year 13 and 16?  

Which population does not change significantly between year 0 and 16?  

In which population was birth rate greater than death rate from year 8 to 12?

In which population was immigration less common than emigration from year 4 to 8?

Exit TicketYou may use your assignments!

You must work quietly & independently.

Talking will NOT be tolerated.

4minute

s!

BIG goal = 80%

4minute

s!

0

Graph 1Graph 2

Period 5

84%

Test Score WARSPeriod 1

77%Melody!

Andre!

corrections

due FRIDAY!

Limiting Factor = something that prevents a population from growing

exponentially

What is preventing the human population from growing infinitely big?

Limiting Factors

Explain the difference between density independent and density dependent limiting factors:

• Density dependent factors are limiting factors only affect populations when they reach a specific density.

• Density independent factors that affect all populations regardless of their densities.

Yellow Perch

Density independent limiting factors

• depth of Lake Winnipeg (affects amount of sunlight in water, and space available in lake)

• temperature of water (affects which fish will live in the lake)• turbidity of water (affects which fish will live in the lake)• migration of yellow perch (depends on which fish are strong

enough to travel)• eyes (helps yellow perch to hide from predators and hunt for

prey)• drought (natural disasters affect water temperature, levels and

turbidity)

Yellow Perch

Density dependent limiting factors

• stunting (due to lack of food or over-abundant population of yellow perch, they will stunt their growth instead of dying)

• predation (yellow perch are eaten by northern pike and walleye)

• parasitism (chestnut lampreys attach to yellow perch and feed of body fluids)

• competition (rainbow smelt compete for space and food)• crowding (rainbow smelt crowd yellow perch)

Yellow Perch

DD or DI?

a. Rainbow smelt and yellow perch attempt to occupy the same area. The more aggressive smelt survive; the perch do not. DD - competition between species only occurs at certain densities

DD or DI?

b. A severe flood brings a lot of sediment and silt into Lake Winnipeg. The turbidity of the lake increases greatly.

DI - natural disasters affect all populations regardless of density

DD or DI?

c. A drought decreases the water level in Lake Winnipeg. The carrying capacity of the lake decreases. DI - natural disasters affect all populations regardless of density

DD or DI?

d. Due to the introduction of rainbow smelt, Lake Winnipeg becomes crowded and some fish species do not survive. DD - crowding only occurs at certain densities

DD or DI?

e. Since northern pike prey on yellow perch, an increase in the perch population causes an increase in the pike population. DD - predation only occurs at certain densities

DD or DI?

f. Many fish die due to an increase in water temperature. DI - temperature affects all population densities

DD or DI?

g. Due to over-fishing, the number of walleye in Lake Winnipeg decreases. DI - human activities affect all population densities

DD or DI?

h. A population is growing quickly when parasites cause disease to spread quickly. DD - parasitism only affects certain population densities

DD or DI?

i. Since lake sturgeon migrate long distances to spawn, many do not survive the trip. DI - behaviors of organisms affect all population densities

Identify three factors that could have caused the overall decrease in the fox population

Habitat lossIntroduced predatorDiseaseOverhuntingOthers??

Fox Populations

Explain, in detail, how each factor you identified in part A would have caused the decrease

Habitat loss – By reducing the amount of space the foxes can live in, the competition between the foxes increasesIntroduced predator – A new predator could have been introduced by humans to the area and it could prey on the foxesDisease – A disease could be introduced to the fox population which is not immune to the diseaseOverhunting – Humans could overhunt the population causing rapid decreaseOthers??

Fox Populations

Identify three factors that could have caused the overall decrease in the fox population

Habitat loss – Density independent Introduced predator – Density dependentDisease – Density dependentOverhunting – Density dependent/independent Others??

Fox Populations

1.

Catalyst(big basket)

2.

Graphing Population Growth #39 (binder)

Monday, April 28th

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