Gr. 9 Work Flashcards
What is soil erosion?
A naturally occurring process that affects all landforms. In agriculture, soil erosion refers to the wearing away of the fieldโs topsoil by the natural physical forces.
What is sustainable farming?
Farming that tries to sustain farmers, resources and communities by practicing methods that are profitable, environmentally sound and good for the community.
What is sustainable agriculture?
Agriculture that is economically viable (profitable), socially supportive (helps workers) and ecologically sound (preserves resources).
In what 4 ways can agricultural activities cause erosion?
Moving the topsoil in preparation for planting crops
Ploughing down steep slopes
Cutting down vegetation to farm
Grazing/ deforestation
What do we call areas where animals and farming equipment/ vehicles use the same accustomed pattern of movement?
Zones of compaction
Remember to do
The mining
What are glaciers?
Moving ice
How can glaciers cause erosion?
Abrasion and plucking
How does abrasion occur?
Rocks carried in the ice scrape the bedrock.
How does plucking occur?
Ice pulls off pieces of bedrock.
What 3 features can be found near glaciers?
Cirques
Arรชtes
Horns
What is a cirque?
A bowl-like depression at the head of a glacier valley.
What is an arรชte?
A narrow ridge
What is a horn?
A peak in a pyramidal shape formed by cirques eroding 3 or more sides of a mountain.
What are drumlins?
Smooth, oval-shaped hills rising from till plains.
What is till?
Deposits of boulder clay or other sediments from a glacier.
What is moraine?
Till deposited along the edges of a glacier.
What 3 types of moraine do you get and what are they?
Terminal moraine-deposited at the end of
the glacier.
Lateral moraine-deposited in a thin line of
debris along the sides
Medial moraine-lateral moraines of two glaciers
merge.
What is a till plain?
A flat deposit of till where an ice sheet that separated from the glacier has melted.
What is an ecosystem?
A community of interacting organisms and their environment.
What is erosion?
The process whereby weathered rock pieces and soil are moved from one place to another.
What is food security?
A country produces enough products to export them, and then uses the income to import the products it needs.