Science Test 12 Oct Flashcards


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1

Abiotic

a non living part of the environment

2

Absorb

To take in or to swallow up

3

Biotic

A living part of the environment

4

Brackish Water

The mixture of fresh and salt water

5

Dissolved oxygen

Free O2 molecules in water; Important for aquatic animal life

6

Divide

An area of high elevation that separates one water shed from another

7

Ecosystem

All the biotic communities that live in an area that together with the abotic factors in the environment

8

Erosion

The caring away of weather rock sediment and soil, by weather and water; a natural process were soil is lost and transported

9

Estuaries

A region of water were a fresh water source meet salt water from the ocean

10

Flood

a rising and overflowing of a body of water into normally dry land

11

Flood plains

a plain built up by stream dopsition

12

Forestry

the science of cultivation maintaining and developing forest

13

Ground Water

Water contained in aquifers underground in the porous or jointed bedrock

14

Habitat

the environment in which a particular species live

15

landforms

feature of the earth surface attributed to natural causes

16

macroinvertebrate

fairly large organism that lack a spinal column such as worms, snails and larvae of flies; dragon flies

17

migratory

passing periodically from one region or climate to another for feeding or breeding

18

neutralize

to make harm substances harmless

19

neutrients

substance needed by organisms for energy, growth, repair or maintanence

20

organism

all living things "plants, mamals....¨

21

PH

a measure of the acidity or alkalinity of a liquid or damp substance - ¨soil¨ - range from 0 -14 ..... 0 being most acidic and 14 being the most alkaline and 7 is neutral

22

River system

A river and all its tributary

23

Runoff

Water from rainfall and the melting of ice that runs along the ground

24

Salinity

A measure of the dissolved salts in a sample of water

25

Sediments

Small particles ¨usually rock¨ that settles at the bottom of water

26

Surface water

The water that is above the ground and streams, lakes, rivers and ponds

27

Tidal

Alternate rising and falling of the surface of the water and the area that is affected by this water level change

28

Topography

The shape of a land surface, showing the position and changes of elevation of the land such as mountains, valleys and rivers

29

Tributary

A stream of water that feeds into a larger stream, river, bay or ocean

30

Turbidity

Sediments suspended in water which causes the water to be unclear or cloudy

31

Waste Management

The control and regulation of waste

32

Water Quality

A measurement of water pureness

33

Water Shed

A region or area where water travels down hill and ultimately drains into a larger body of water

34

Wet lands

An ecosystem in which the root of the plants are submerged under water at least part of the year ¨ie. marshes, bogs, swamps¨

35

swamps

A area of land permanently filled with water

36

marsh

an area of land where water covers ground for long periods of time

37

eutrophication

nutrients saturated shallow algae and bacteria development

38

thermal pollution

heated water released into a body of water

39

Salt marshes

coastal wetlands