Topic 1
Topic 2
Topic 3
Topic 4
Surprise
100
What is 1 way humans use water?
Answers may vary: Irrigation, Agriculture, Domestic, Industry and Recreational
100
How does a wave work?
Waves- in water, circular movement of water particles that causes a change in pattern that moves along the water’s surface; the pattern can move over long distances but the water particles do not
100
Which ecosystem supports greater diversity?
Saltwater
100
What percent of water is used for industry?
22%
100
Give an example of an aqutic adaptaion and explain what it is for.
Answers may vary
200
Define Potable Water
Water that is safe for humans to drink
200
Define erosion, deposition or sediments
Erosion- the wearing away and transporting of rock fragments and soil.
Sediments- eroded rock fragments and soil carried by wind or water
Deposition- the laying down or depositing of sediments.
200
What is a continental shelf?
Shelf of land that extends out from the edge of a continent below the ocean’s surface.
200
Name 1 advantage & disadvantge or water dams
Answers may vary
200
What animal can live in both fresh and saltwater?
Salmon
300
Name 2 things that determine water quality
Answers may vary:
soil, geologic formations and terrain in the catchment area (river basin)
surrounding vegetation and wildlife
precipitation and runoff from adjacent land
biological, physical and chemical processes in the water
human activities in the region
300
Fill in the blank:
When plates ______ trenches form.
When plates ______ ridges and faults form.
Converge
Diverge
300
Summer Vs. Winter Water Quality
In the Spring, photosynthesis rates increase and the levels of oxygen in a lake/pond increase
Lots of organisms thrive with the increased oxygen levels
Towards the end of the summer, less nutrients are available as resources run out
Oxygen levels deplete towards the end of the summer
300
Explain how power stations are harmful to water quaility.
Discharge warm water into lakes or rivers
Can kill organisms or cause excessive plant growth
300
What micro organism causes bever fever?
Giardia
400
Name 3 things water is tested for
Answers may vary:
Taste and odour
Turbidity (cloudiness) and colour
Toxic substances and other pollutants
Bacteria
Hardness or mineral content
pH (acid/base)
dissolved oxygen
Solids, including floating materials
Dissolved solids
400
Explain how chinooks work
Warm air coming in from the Pacific is filled with moisture. As the air moves over the Rocky Mountains, the air cools down causing the water moisture to fall as precipitation. By the time the air reaches the east side of the Rockies, it has lost most of its moisture.
400
What are the 3 things that conriubte to changes in population?
Seasonal Changes - Populations swell in summer months and then decrease in winter months (hibernate or are dormant); breeding stages of organisms also contribute to population changes (ex. mosquito larvae in early summer)
Short Term Changes - might be part of a natural event or it might be caused by human activities (pond dries up, oil spills, El Nino)
Long Term Changes- can also result from natural causes or human activities (natural landslide, introduction of non-native species to an area)(bioinvasion)
400
Fill in the blanks:
__% of Earth’s surface is water
__% is salt water in the oceans
_% is freshwater
Of the freshwater:
__% is ice
__% is groundwater
_% is in lakes, rivers, and wetlands.
Only about ______% of all water on Earth is available for humans to drink (potable).
Canada has _% of all of the world’s freshwater.
74% of Earth’s surface is water
97% is salt water in the oceans
3% is freshwater
Of the freshwater
77% is ice
22% is groundwater
1% is in lakes, rivers, and wetlands.
Only about 0.003% of all water on Earth is available for humans to drink (potable).
Canada has 9% of all of the world’s freshwater.
500
Explain osmosis, reverse osmosis, and distillation when converting saltwater to freshwater
Osmosis- movement of water particles through a membrane from an area of high water concentration to an area of low water concentration
Reverse osmosis- movement of water through a membrane from an area of lower water concentration to an area of higher water concentration; used to purify water
Distillation- technique for separating solutions that involve boiling, evaporating, and condensing
500
What do currents do and give an example?
Moves water from place to place
Ex.
North Atlantic Current carries warm water from the equator into the northern hemisphere.
Labrador Current carries cold water down into southerly areas.
500
How is run-off damaging to water quaility?
Run off from farming lands can contain high quantities of fertilizers and nutrients. If this run off reaches a pond or lake, an algal bloom can occur. These are dangerous because they block out light to the plants below. Consequently, the plants die. This causes a reduction in oxygen production which leads to more organisms dying off.
500
Explain the water cycle
