Scientific Method Revisit

Keep your quiz and your scientific method objective sheet in front of you.

Quizzes show you what you know and what you need to practice more.

As we go over the quiz, add new insights on your objectives. You will need the objective sheets for the final and AP review.

Save all your objective sheets!

Blood sugar and brain shrinkage – Obj #8

BE SPECIFIC!Brain damage is too broad.Once a variable is the Independent Variable,

it can’t also be a controlled variable.

PLEASE SHARE IF YOU HAVE A STARRED*** ANSWER.

Quiz #10 (Obj #7)

PLEASE SHARE IF YOU HAVE A STARRED*** ANWER

Quiz #11 (Objective #6)

Please get out objectives #1-7 for a stamp.

Use a different colored pen/pencil to add new insights as you compare your work with your neighbor’s.

Read the entire board.Thanks!

Following these directions will

help you prepare for the quiz!

4th period

• Set up an account at www.edmodo.com• APES 4th pd join url: edmo.do/j/kmzbmf• Password: 37xgj2• Field journal picture must be uploaded by Fri

Sept 6• Trouble? Wed 7:15 or Thursday lunch

5th period

• Set up an account at www.edmodo.com• APES 5th pd join url: edmo.do/j/ege75u• Password: u4p7t8• Field journal picture must be uploaded by Fri

Sept 6• Trouble? Wed 7:15 or Thursday lunch

6th pd

• Set up an account at www.edmodo.com• APES 6th pd join url: edmo.do/j/mft7d3• Password: 8zzbxx• Field journal picture must be uploaded by Fri

Sept 6• Trouble? Wed 7:15 or Thursday lunch

IMPACT ON THE PLANET =

POPULATION OF HUMANS

X

AFFLUENCE (INDIVIDUAL USE OF RESOURCES)

X

TECHNOLOGY

I=PAT

WHAT ARE THE RULES? THEY DON’T APPLY TO US, DO THEY?

Population Ecology

Rule #1: Populations will grow exponentially

according to their biotic potential

Linear growth vs. exponential growth

Biotic potential – capacity for growth

Age at reproductive maturity

Generation timeTime between

reproductive eventsOffspring per

reproductive event

Rule #2: Populations cannot increase

indefinitely

Sigmoidal growth – the S curve

Carrying capacity

The number of individuals of each species that can survive in an area indefinitely.

Subtle details!

At carrying capacity (K), individuals are still dying and being born. The total population size is constant.

Populations do not know when they’ve reached K

Populations cycle above and below K several times before leveling out.

Limiting factors set the carrying capacity

Two categories of limiting factors

1. density-independent limiting factorsNatural disastersClear cutting

2. Density-dependent limiting factors Food Mates Space Disease predators

Rule#3: There is more than one strategy for getting your

genes into the next generation

Reproductive similarities?

Reproductive similarities?

Opportunists vs. Competitors

Survivorship curves

Rule #4: Predator and prey develop a predictable

pattern.

Lotka-Volterra model

Soooo . . . Good thing we’re human and these rules don’t

apply to us . . . Right?

Or do they? What part(s) of the sigmoidal curve do you see?

Name two density-dependent and two density-independent factors that apply to humans.

Are we r- or K- strategists? Defend your answer.

How do humans avoid the Lotka-Volterra model?