vocab Flashcards

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1
Q

abiotic factor , what is it ?

A

Physical, or nonliving, factor that shapes an ecosystem.

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2
Q

atmosphere. what is it ?

A

Relatively thin layer of gases that from in earth’s outermost layer

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3
Q

hydrosphere , what is it ?

A

potion of earth, that consists water, in any of its forms. including oceans, glaciers, rivers, lakes, groundwater, and water vapor.

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4
Q

geosphere, what is it ?

A

the densest part of earth, which includes the crust, mantle and core.Includes rocks, continents , and the ocean floor too.

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5
Q

ecosystem

A

all the organisms that live in a place, together with their nonliving environment

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6
Q

biosphere

A

part of earth in which life exists including land, water, and air or atmosphere

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7
Q

ecology

A

scientific study of interactions among organisms and between organisms and their environment.

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8
Q

biome

A

a group of ecosystems that share similiar climates and typical organisms

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9
Q

population density

A

number of individuals per unit area

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10
Q

population distribution

A

how individuals are spaced out across their range

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11
Q

age structure

A

the number of males and females of each age in population

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12
Q

what factors affect population growth .?

A

Birth date, Death rate, and the rate at which individuals enter or leave a population all affect population growth

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13
Q

how do ecologists study about populations?

A

Ecologists study populations by examining their geographic range, growth rate, density, and distribution, and age structure.

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14
Q

Exponential growth cause

A

A species is introduced into a new region with plentiful resources and few predators

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15
Q

Exponential growth effect

A

Birth rates are high , death rates are low, the population increases steeply.

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16
Q

logistic growth, phase 1 cause and effect

A

Cause : Species is introduced into a new region with plentiful resources and few predators,
Effect: Population decreases

17
Q

exponential growth, bad or good

A

A species is introduced into a new region with plentiful resources and few predators, GOOD!!!!! BIRTH RATES ARE HIGH, DEATH RATES ARE LOWER, AND POPULATION INCREASES !

18
Q

logistic growth, good or bad ???

A

Bad, capacity is reached, resources become limited, population deceases

19
Q

IMMIGRATION .

A

IMPORT, IN , PEOPLE MOVE IN

20
Q

EMIGRATION

A

OUT, PEOPLE EXITING

21
Q

EXPONENTIAL GROWTH?

A

GROWTH PATTERN IN WHICH THE INDIVIDUALS IN A POPULATION REPRODUCE/ GROW AT AN INCREASING RATE

22
Q

THE LOGISTIC GROWTH CURVE

A

SHAPED LIKE A S- SHAPED CURVE WHEN OCCURS A POPULATIONS GROWTH SLOWS AND THEN STOPS, FOLLOWING A PERIOD OF TIME OF EXPONENTIAL GROWTH.

23
Q

CARRYING CAPACITY?

A

MAX NUMBER OF INDIVIDUALS OF A PARTICULAR SPECIES THAT A PARTICULAR ENVIRONMENT CAN SUPPORT

24
Q

LIMITING FACTOR ?????

A

FACTOR THAT CAUSES POPULATION GROWTH TO DECREASE

25
Q

DENSITY DEPENDENT LIMITING FACTOR

A

LIMITING FACTOR THAT DEPENDS ON POPULATION DENSITY, INCLUDING COMPETITION, STRESS FROM OVERCROWDING , PARASITISM, DISEASE, PREDATION, AND HERBIVORY.

26
Q

DENSITY DEPENDENT LIMITING FACTOR COMPETITON

A

WHEN POPULATION DENSITY IS HIGH, INDIVIDUALS COMPETE FOR FOOD, WTAER, SPACE, SUNLIGHT, AND OTHER RESOURCES THAT MAY BE LIMITED.

27
Q

DENSITY DEPENDENT LIMITING FACTOR PARASITISM AND DISEASE

A

PARASITES AND DISEASES- CAUSING ORGANISMS WEAKEN THEIR HOSTS AND CAN CAUSE DEATH.

28
Q

LIMITING FACTOR

A

ANY FACTOR THAT CONTROLS THE GROWTH OF A POPULATION. DECREASE

29
Q

DENSITY, INDEPENDENT LIMITING FACTORS , ARE ???

A

ENVIROMENTAL EXTREMES INCLUDING WEATHER SUCH AS HURRICANES, DROUGHTS, OR FLOODS, AND NATURAL DISASTERS SUCH AS WILDFIRES, ENVIROMENTAL ISSUES/ CLIMATE

30
Q

RELATIONSHIP BETWEEN LIMITING FACTORS AND EXTINICTION

A

IF CARRYING CAPACITY FALLS LOW ENOUGH, POPULATIONS CAN BE WIPED OUT, LEADING TO SPECIES EXTINICTION. AN EXTINCT SPECIES HAS NO MEMBERS REMAINING LIVING

31
Q

HUMAN POPULATION SIZE CHNAGE OVERTIME

A

HUMAN POPULATIONS , LIKE OTHER POPULATIONS TEND TO INCREASE, AND THE RATE OF THOSE INCREASES HAS CHANGED OVER TIME

32
Q

WHAT FACTORS MEASURED TO DETERMINE IF A DEMOGRAPGHIC CHANGE IS OCCURING ?

A

BIRTH DATES, DEATH RATES, AGE STRUCTURE

33
Q

DEMOGRAPHY

A

SCIENTIFIC STUDY OF HUMAN POPULATIONS

34
Q

DEMOGRAPHIC TRANSITION

A

CHNAGE IN A POPULATION FROM HIGH BIRTH AND DEATH RATE TO LOW BIRTH AND DEATH RATES

35
Q

POPULATION GROWTH RATES DIFFER AMOUG COUNTRIES ???

A

BIRTH RATES, DEATH RATES, AGE STRUCTURE HELP PREDICT WHY SOME COUNTRIES HAVE HIGH GROWTH RATES WHILE OTHER COUNTRIES POPULATIONS INCREASE MORE SLOWLY.

36
Q

what is a biotic factor ??

A

Any living part of the environment with which an organism might interact