1.3 Sources of Fresh Water, p. 22

Only 1 % of all of earth's freshwater supply is easily accessible!

Most of the fresh water is trapped in ____________.

SO... where do we find fresh water?

a) Lake

Ex The Great Lakes

b) Pond

c) Wetlands- Wherever there is a low area in the land

- Different types, but they are all WET

- An important habitat, diversity of wildlife and plants

- Wetlands are saturated with water much of the time.

Ex, Marshes, a shallow wetland ( 1m or less deep)

Stratford

Streams and Rivers

Who needs oxygen?

Certain fish, plants,

Pond story...

The faster the water flows the more Oxygen there is in the water...

Ground Water (see 1.11)

Most water (rain/snow) that falls on land

sinks into the land,

trickles down in cracks and pores

stops at Bedrock (solid)

Bedrock, like Granite...

water

Groundwater

Well

Part 2 of “Pond Story”...Man made pond that is fed by a freshwater “spring” in the ground - 1976● Plants added, allowed to settle

for 3 years● Lots of frogs, bugs, diverse

plant life● Book trout added

1979...disaster!!

Fast forward to 1984...Mrs S is 14….

The descendants of the goldfish in May 2016

Glaciers:

- Snow stays on ground year round

- It compresses into ice over time

- The pressure on the ice at the bottom

causes partial melting

- The the mass of ice and snow

move downhill...called a glacier

Trivia: ⅔ of the world's fresh water is trapped in Glaciers!!

Glacier national park, BC

What happens to Glaciers? Read top of p 24

1)

2)

Draw a picture...

Athabasca Glacier, AB, part of the Columbia Icefields

1) Gravity is pulling it downward, if it reaches a depression (or the ocean) it will drop down and deep cracks called crevasses will form across the front of the glacier

Hiking? No thanks...

“Shallow” crevasses...for adventurers.

2) Icebergs: Gravity pulls glaciers downward and when they reach the ocean (like in Greenland), large pieces of the glacier break off into the ocean into big chunks called icebergs

ICEBERGSIcebergs in Newfoundland

https://www.theweathernetwork.com/news/articles/icebergs-sighted-early-off-newfoundland-coast/81365

Greenland: (Denmark)

Baffin Island

Baffin Island Glacier

Assignment: Glaciers and the Water Cycle, read p 24Summarize the main points, or draw an “info-graphic” type of picture

● Glaciers and the year round snow in mountains act as natural reservoirs. ● These reservoirs collect snow throughout the fall, winter, and spring. ● They gradually release this reserved water as meltwater in summer.

Glaciers and the Water Cycle, read p 24Why are glaciers important?

1) Glaciers have a direct influence on the world’s water cycle by slowingthe passage of water through the cycle.

2) Glaciers are BIG storehouses of fresh water.

3) They release this water when needed the most...hot, dry summer months.

4) They provide important clues to the past. (Glacial ice accumulates and endures, so glaciers offer source of info about Earth’s past climates...thousands of years old in deepest layers).

All of Canada was covered in last ice age,

...ended 11 000 year ago

Where were the people Living?

How did they get there?

What was the temp?

Ice Ages: answer Q 4, p 26 (read p24)

Glaciers and Global warming:Read p 25, answer: How is global warming affecting glaciers?

avg Earth temphas increased 0.5°C

Glaciers are receding:Melting + shrinking

Glacier in Peru

June 2006

Glaciers and Global warming:Read p 25, answer: Why is the Athabasca Glacier in AB important?

Source of water for:AlbertaThe PrairiesMany US Western States

Why should we be concerned about glaciers melting at a quicker pace than ever before? (p 25)

1) Ocean waters may rise (This melted glacial water has to go somewhere), which is disastrous for coastal communities.

2) If a glacier completely disappears then crucial rivers (that are replenished by glaciers) that supply water to people could dry up.