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7 science > alex 7 science unit 1 test > Flashcards

alex 7 science unit 1 test Flashcards

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Biology 101 flashcards
0
Q

Independent variable

A

What is being tested

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1
Q

Scientific method

A 
Stating a problem
Gathering info
Suggesting an answer
Performing an experiment
Recording the results
Stating conclusions 
Communicate your results
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2
Q

Dependent variable

A

What is observed

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3
Q

Controlled variable

A

Things that could change but don’t

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4
Q

Ecology

A

The study of the interrelationships of living organisms and their environment

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5
Q

Ecologist

A

A person who studies ecology

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6
Q

Habitat

A

The area in which an organism lives

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7
Q

Environment

A

All the living and non- living conditions that act on an organism and affect its chances of survival

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8
Q

Abiotic factors

A

Non-living or physical factors eg. Temperature amount of water amount of oxygen amount of light

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9
Q

Biotic factors

A

Living factors eg. Amount of food predators parasites competitors

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10
Q

Species

A

Group of organisms that can interbreed to produce viable offspring

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11
Q

Community

A

All the organisms in a particular area at a given time

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12
Q

Population

A

The number of individuals of the same species in a given area at a given time

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13
Q

Ecosystem

A

A natural unit of living and non-living parts that interact to produce a stable system in which the exchange of materials between living and non-living parts cycle

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14
Q

Biome

A

A biome is a large easily differentiated community unit arising as a result of complex interactions of climate ,other physical factors an biotic factors examples of biomes are tundra temperate grassland desert and tropical rainforest

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15
Q

Biosphere

A

The biosphere is the collective interaction of all the biomes on the earth

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16
Q

Symbiosis

A

A relationship in which two organisms of different species ‘live together’ for a period of time

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17
Q

Parasitism

A

A form of symbiosis in which one organism derives nutrients from the second organism which suffers some harm but is usually not killed eg.a tick is the parasite that feeds of a dog which Is the host

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18
Q

Mutualism

A

A form of symbiosis in which both organisms help each other

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19
Q

Commensalism

A

A form of symbiosis in which one organism helps the other organism but there is no benifit nor harm done in return

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20
Q

Predator /prey relationship

A

The relationship in which one organism hunts and eats another

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21
Q

Competition

A

A relationship where two types if organisms compete for the same

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22
Q

Factors effecting population

A 
Available resources 
Activities of other organisms
Organisms own characteristics
Time of day or year
Weather
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23
Q

Adaptation

A

a characteristic of an organisms that enable it to function more effectively or survive in its surroundings

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24
Q

5 types of adaptation

A 
structural
color
physiological
behavioural
reproductive
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25
Q

structural adaptation

A

related to the structure of the organism

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26
Q

color adaptation

A

related to the color

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27
Q

physiological adaptation

A

related to the organisms metabolism

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28
Q

reproductive adaptation

A

related to the courtship mating or rearing of young

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29
Q

natural resources

A

the materials and products found in nature

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30
Q

need

A

what you need

31
Q

want

A

what you want

32
Q

primary succession

A

an ecosystem that is slowly starting to grow from nothing

33
Q

secondary succession

A

an ecosystem that was a thriving ecosystem but got destroyed and is now growing again

34
Q

pioneer species

A

new species to that land

35
Q

original species

A

the original species of that land

36
Q

climax community

A

a thriving ecosystem

37
Q

bioindicater species

A

a species that shows us that something is wrong in the environment

38
Q

biological control

A

to control insect pests by using their natural enemy(brining in an exotic species even thought it may harm the original species)

39
Q

extinction

A

when an animal died out completely

41
Q

exterpation

A

when an animal species dies out in a area but is still alive in a different area

42
Q

physical monitoring

A

uses satellites to track the changes in landscapes over time

43
Q

environmental monitoring

A

tracks changes in climate temperature and weather patterns

44
Q

weather

A

day to day

45
Q

climate

A

long term

46
Q

chemical monitoring

A

the quality of air soil and water

47
Q

biological monitoring

A

tracks the changes in organisms or populations of organisms

48
Q

sustainability

A

resources of nature are being renewed at least as quickly as they are being used

49
Q

ecological footprint

A

a calculation of the total area of land and water needed to supply all of the materials and energy a human uses as well as the waste produces

50
Q

3 r’s

A

reduce
reuse
recycle

51
Q

consumers

A

organisms that eat the food made by the producers

52
Q

producers

A

organisms that make there own food

53
Q

carnivores

A

organisms that only eat meat

54
Q

herbivores

A

organisms that only eat plants

55
Q

omnivores

A

organisms that eat plants and meat

56
Q

food chain

A

a sequence of feeding relationships among living organisms as they pass on food energy

57
Q

food web

A

the network of feeding relationships among organisms

58
Q

food pyramid

A

the pyramid which shows us the transfer of energy

59
Q

biomass

A

the total mass of living matter

60
Q

energy flow

A

the movement of energy which originally comes form from the sun

61
Q

scavenger

A

an organism that eats dead or decaying plant or animal matter

62
Q

decomposer

A

organisms that break down the cells of dead or waste material and absorb their nutrients

63
Q

carbon cycle

A

the cycle in which carbon is used and reused in the ecosystem

64
Q

water cycle

A

the continuous movement of water through the biosphere

65
Q

water cycle steps

A

evaporation
transpiration
condensation
precipitation

66
Q

ph.

A

a scale used to express acid or alkaline content

67
Q

bioaccumulation

A

movement of pollutants through the levels of a food chain so that greater quantities are retained with movement of the food chain

68
Q

baseline data

A

basic info

69
Q

permanent plots

A

quadrats

70
Q

quadrats

A

a small area of a larger area

71
Q

environmental impact assessment

A

environmental report

72
Q

calculating population in an ecosystem

A 
species : blue beetles
ecosystem type:forest
ecosystem size:1000m2
# of quadrats:5
each quadrats is:1m2
1rst quadrat:13 blue beetles
2nd quadrat:15 blue beetles
3rd quadrat:16 blue beetles
4th quadrat:14 blue beetles
5th quadrat:13 blue beetles
total area of quadrats:5m2
total# of blue beetles in quadrats:71 blue beetles
71/5:14.2blue beetles per1m2
14.2x1000:14200blue beetles in the forest ecosystem
73
Q

Standard use for comparison

A

Control group

74
Q

New products or tools made because of knowledge gained through science

A

technology

75
Q

science

A

The process of understanding the world

7 science (6 decks)

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