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Gr. 8 Science > Fresh And Saltwater Systems Unit Test > Flashcards

Fresh And Saltwater Systems Unit Test Flashcards

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1
Q

List factors of water quality

A 
Taste and odour 
Turbidity and colour
Toxic substances and other pollutants
Bacteria 
Hardness or material content 
PH ( acidic or basic )
Dissolved oxygen 
Solids including floating materials 
Dissolved solids
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2
Q

How is water distributed on the earth for

A

3% is fresh
0.0009% is in the atmosphere
97% is salt

26% is land
74% is water

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3
Q

What is the difference of between hard and soft water

A

Hard water had more mineral content then soft water

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4
Q

Distillation

A

A solution Is boiling and the water evaporates and leaves salt behind the water vapour turns to fresh water droplets and goes to a different glass

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5
Q

Reverse osmosis

A

Forcing salt water through a filter or membrane with holes small enough fir water to pass through but not salt

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6
Q

What causes waves and how forget form

A

Waves are changes in patterns that move along the waters surface. Most waves are caused by winds

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7
Q

What effect does water have on shorelines

A

The force of waves crashing against a shoreline can shape the shore

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8
Q

What are tides and what causes them

A

The gravitational force of the moon is the main cause for ocean tides on earth

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9
Q

The 1st stream characteristics

A

A river or stream may start in the mountains where a glacier is melting

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10
Q

2bd stream characteristics

A

In early stages it flows swiftly and straight

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11
Q

3rd stream characteristics

A

As the ground becomes more level the water slows down

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12
Q

4th stream characteristics

A

At the mouth the river enters a lake or ocean

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13
Q

What is chemical weathering

A

Erosion can occur because of chemical weathering. Caves form when rainwater and streams dissolve limestone and other rocks. As it sits there it gradually dissolved more and more of the rock

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14
Q

What makes a watershed

A

A water shed is all the area of land that drains into one main lake or river

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15
Q

What is the theories of continental drift and plate tectonics

A

Plates move ver slowly across the earth because of convection currents within earth

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16
Q

How do these theories explain geological feature on the ocean floor

A

Theses movement have shaped the geological features on the ocean floors and many of those on continents

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17
Q

Moralines

A

Form from rock and gravel build up along side of a glacier

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18
Q

Eskers

A

Form when parts of glaciers melt tunnels under ice

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19
Q

Drumlins

A

Small hills in a teardrop shape form when a glacier moves over moralines

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20
Q

Kettle lakes

A

Formed when large chunks of ice left when glaciers melted away

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21
Q

Delta

A

Repeated glaciation has worn them down

22
Q

What effect does large bodies of water have On the climate

A

The main effect that it has on the climate in an area is to prevent extremes I. Temperatures

23
Q

What effect does ocean currents have on the climate

A

Currents can carry warm water to colder areas

24
Q

What is diversity

A

Variety of differ t kinds of species living in A area

25
Q

In what ways do humans use water?

A

Agriculture 73%
Industry 22%
Domestic 5%

26
Q

Potable water

A

Water humans can drink safety

27
Q

Our of fresh water ________% is ice,groundwater,lakes rivers and wetlands

A

Ice 77%
Groundwater 22%
Lakes,rivers and wetlands 1%

28
Q

What is the basic saltwater solution?

A
  1. 5% water

3. 5% dissolved salts

29
Q

How are tsunamis formed

A

Earthquakes can create huge ocean waves called tsunamis

30
Q

Stream characteristics

A

Include the rate of water flow and slope of streams bed

31
Q

What do hot springs do?

A

Hot springs bring dissolved sediments up within the earth and deposit them on the surface

32
Q

Two plants moving toward eachother meet

A

Ocean trench

33
Q

Molten rock oozes out of large crack in ocean’s floor

A

Mid ocenaic ridge

34
Q

Volcanoes grow up from the ocean

A

Volcanic islands

35
Q

Shallow area form around continents edge

A

Continental shelf

36
Q

Deposition

A

Laying down or depositing of sediments

37
Q

What diversity would you find in a pond

A

There’s a lot of underwater animals and not underwater animals. Some can fly somewhere or micro scopic

38
Q

What are differences and similarities of Lake sounds and ocean zones

A

Similarity are the other living things interact with other living things. The differences are there’s greater diversity and oceans and different kind of diverse environments

39
Q

What are the zones in a pond or lake

A

Upper zone of the lake where aquatics plants grow and small fish and insects live.
Middle zone is open water and plyo tank in our food for fish
The lowest stone has no light and bigger fish

40
Q

Does the zones in an ocean

A

Estuary. Freshwater and saltwater oceans mix and form brackish water lots of birds and different kinds of plants and animals.

Intertidal zone. Animals and plants have to be able to withstand the pounding waves to live here

Continental shelf. A shelf of land that extends out from the edge of a continent below the ocean surface.

Yannick zone. Deepest parts of the ocean no light and little oxygen

41
Q

Benefits and costs of agriculture

A

Benefits are there’s a lot of economy for different countries and there’s food.

Costs are over irrigation of soil can dissolve salt in the soil

42
Q

Industrial cost and

A

Benefits are it is used as a coolant for washing pollution before released back into the environment

Can affect water is the water is not cleaned before it’s put in to the environment again

43
Q

Benefits and costs for domestic

A

Nephets are there pumped into homes for developed countries.

Costs are some homes cat have water pumped into their homes

44
Q

Factories

A

Add dangerous chemicals to water

45
Q

Power Stations

A

Discharge warm water

46
Q

City

A

Oil, salt and other chemicals affect plants and animals

47
Q

Farmland

A

Can cause excessive plant growth

48
Q

Habitat destruction

A

Takes away places the animals and plants live

49
Q

Oil spills

A

Harm animals in the water around it

50
Q

Sewage

A

Uses up oxygen for fish

Gr. 8 Science (15 decks)

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