Ecology

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Geosphere/Lithosphere

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Grade 9 Science Exam

34 Terms

1

Geosphere/Lithosphere

rocks,minerals,earths crust

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2

Atmosphere

Air,gases

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3

Hydrosphere

water

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4

biosphere

plants,animals,living things

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5

biotic

Are living or once were

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6

abiotic

Non-living things that influence an ecosystem

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7

herbivore

organism that only eats plants

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8

carnivore

organism that eats mostly/only meat

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9

omnivore

organism that eats both plants and animals

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10

detrivore

organisms that eat deccaying organic material

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11

decomposer

organism that breaks down decaying material into nutrients

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12

producer

organisms that produce their own food

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13

food chain

feeding relationships between organisms

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14

food web

over lapping and interconnecting food chains

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15

primary conumers

first to consume on the trophic level

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16

secondary consumer

second to consume on the trophic level

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17

teritary consumer

third to consume on a trophic level

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18

photosynthesis

the process in which plant produce oxygen and glucose

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19

cellular respiration

the process in which animals produce carbon dioxide and water

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20

Primary Succesion

Newly exposed or newly exposed rock is colonized by living things for the first time

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21

Secondary succesion

An area that has been disrupted (flood,eruption) but recolinizes after

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22

Dissolved oxygen

The amount of oxygen available to aquatic organisms

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23

Biological oxygen demand

The amount of oxygen needed by decomposers in an aquatic ecosystem to break up waste

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24

Eutrophication

Inorganic enrichment of natural waters, leading to an increased production of algae and macrophytes

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25

Oligotrophic

Healthy lake

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26

Keystone species

typically an apex predator that regulates the population of lower trophic levels, therefore keeping ecosystems in equilibrium. Part of the food web would die off without them

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27

Biodiversity

the number of different types of organisms (species) within an ecosystem

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28

Carrying capacity

The carrying capacity is the maximum population size (number of individuals of the same species) that an ecosystem can maintain over a period of time

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29

Dynamic Equillibrium

when the forward and reverse processes occur at the same rate, resulting in no observable change in the system.

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30

Limiting factor

anything that constrains a population's size and slows or stops it from growing.

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31

Carbon cycle

nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again

<p>nature&apos;s way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again</p>
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32

Nitrogen cycle

a biogeochemical process through which nitrogen is converted into many forms, consecutively passing from the atmosphere to the soil to organism and back into the atmosphere

<p>a biogeochemical process through which nitrogen is converted into many forms, consecutively passing from the atmosphere to the soil to organism and back into the atmosphere</p>
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33

autotroph

producer

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34

heterotroph

consumer

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