Water
True or False: Evaporation is the process where liquid water changes into water vapour.
True
What percentage of water on earth is saltwater in oceans?
97%
How are glaciers formed?
What is till?
A jumble of boulders, sand, clay, and silt sediments that drop from a glacier base
What is an advancing glacier?
In colder climates, little melting occurs and the glacier continues to grow or move forward
What county holds the worlds largest supply of freshwater?
Brazil
What location contains the majority of earths fresh water supply?
Glaciers and ice caps
What is Ice Core Dating?
A method scientists use to tell the age of ice layers drilled from glaciers and ice sheets.
What is a moraine?
Sediment is dropped at the front of the glacier and is formed from the glacier pushing the land
What is a retreating glacier?
In warmer climates, the glacier melts faster than it grows and leaves the rocks, soil and large boulders it once contained
Identify two factors that can lead to changes in Earth's temperature and trigger an Ice Age.
Reduced thermal energy/radiation from the Sun
Mountain building (accumulates snow and reflects solar radiation)
Movement of tectonic plates (alters oceans and ocean currents)
Changes in the tilt of the Earth's axis
True or false: Salt water is water is potable.
False!
Greenland and Antarctica
What is a erratic?
Glacially-deposited rock differing from the size and type of rock native to the area in which it rests
Does erosion or deposition create cirques?
Valley glaciers carve (erode) bowl-shaped basins,
What is a contonental glacier?
continuous masses of ice that are much larger than valley glaciers.
What is a primary reason that access to potable (safe drinking) water remains a challenge on some reserves?
Lack of proper water treatment infrastructure and funding
What is an icefield?
An upland area of ice that feeds two or more glaciers.
What is meltwater?
water formed by the melting of snow and ice, carves channels in and throughout glaciers.
When two or more glaciers act on a mountain - eroding it from two different directions, a ridge forms
What percentage of human mass is water?
65%
Name two categories of human water use in Alberta.
Agriculture & Irrigation
Industrial Uses (e.g., thermal power, manufacturing, oil & gas, mining)
Domestic Uses (e.g., household, community drinking water)
Explain why mountain glaciers and snowpacks are referred to as "natural reservoirs."
Glaciers store fresh water as snow/ice during cold months and release it gradually as meltwater during warmer months to feed rivers and supply human/ecosystem needs
What is a millwell?
a rounded drain in the ice that is chiseled by a stream as it plunges downward
What is a crevasse?
A fissure, or crack in the ice