Scientific Method Revisit
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Transcript of Scientific Method Revisit
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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!
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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.
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PLEASE SHARE IF YOU HAVE A STARRED*** ANSWER.
Quiz #10 (Obj #7)
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PLEASE SHARE IF YOU HAVE A STARRED*** ANWER
Quiz #11 (Objective #6)
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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!
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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
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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
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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
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IMPACT ON THE PLANET =
POPULATION OF HUMANS
X
AFFLUENCE (INDIVIDUAL USE OF RESOURCES)
X
TECHNOLOGY
I=PAT
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WHAT ARE THE RULES? THEY DON’T APPLY TO US, DO THEY?
Population Ecology
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Rule #1: Populations will grow exponentially
according to their biotic potential
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Linear growth vs. exponential growth
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Biotic potential – capacity for growth
Age at reproductive maturity
Generation timeTime between
reproductive eventsOffspring per
reproductive event
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Rule #2: Populations cannot increase
indefinitely
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Sigmoidal growth – the S curve
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Carrying capacity
The number of individuals of each species that can survive in an area indefinitely.
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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.
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Limiting factors set the carrying capacity
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Two categories of limiting factors
1. density-independent limiting factorsNatural disastersClear cutting
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2. Density-dependent limiting factors Food Mates Space Disease predators
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Rule#3: There is more than one strategy for getting your
genes into the next generation
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Reproductive similarities?
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Reproductive similarities?
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Opportunists vs. Competitors
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Survivorship curves
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Rule #4: Predator and prey develop a predictable
pattern.
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Lotka-Volterra model
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Soooo . . . Good thing we’re human and these rules don’t
apply to us . . . Right?
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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?