Geography Vocabulary Lecture Notes

Comprehensive vocabulary flashcards covering geographic, geologic, climate, and vegetation terms from the lecture notes.

Active layer

The shallow top layer of soil directly above the permafrost that thaws out during the short Arctic summer, becoming temporarily water-logged so mosses and small shrubs can grow.

Air mass

A massive volume of air that shares a relatively uniform moisture and temperature profile based on the geographic area where it originally formed.

Air pressure

The physical weight of air pressing down on the Earth's surface.

Appalachian Mountains

An old highland region in eastern Canada formed roughly $300\text{ million}$ years ago, where millions of years of erosion and glaciation have ground down its once-jagged peaks into rolling mountains and hills.

Average annual temperature

A value calculated by adding the twelve individual monthly average temperatures of a specific location together and dividing the total by twelve.

Bedrock

The solid, unweathered rock layer that lies firmly beneath the surface soil, loose sediments, and organic materials.

Boreal and taiga forest

The single largest vegetation region in Canada, located directly south of the tundra, dominated by specialized coniferous trees adapted to low precipitation and long winters.

Calcification

A mineral-accumulation process that occurs in dry, arid climates where evaporating moisture from the topsoil causes water from deeper underground to be pulled upward via capillary action, leaving a thick layer of dissolved calcium carbonate near the surface.

Canadian Shield

The massive, ancient geographic foundation of Canada representing the only part of Canada that existed during the Precambrian era, once featuring massive mountain ranges that have since been worn down to a flat plain.

Capillary action

The physical process by which water is naturally drawn upward through tiny spaces between soil particles, operating much like a paper towel soaking up a liquid spill.

Cenozoic era

The most recent geologic era (beginning $66\text{ million}$ years ago), during which Canada's landforms took on their final modern shapes, mammals flourished, and human life evolved.

Climate

A long-term pattern of weather conditions experienced by a region over a prolonged span of time (typically calculated over $30\text{ years}$ or more).

Condensation

The physical process by which water vapor cools down and changes state from an invisible gas into visible liquid water droplets (forming clouds).

Coniferous trees

Needle-leaf evergreen trees (such as spruce, fir, and pine) that use thick bark, narrow waxy needles, and a sticky sap that serves as natural anti-freeze to survive cold, freezing conditions without shedding foliage.

Continental climate

A climate type typical of the interior of large landmasses far from oceans, characterized by a very large annual temperature range (hot summers, cold winters) and low precipitation.

Continental drift

The landmark scientific theory stating that all of the Earth's landmasses were once joined together in a single supercontinent and have been constantly drifting apart in different directions ever since.

Convection currents

Circular movements of heat within the Earth's mantle caused by the unequal distribution of heat, acting as the driving engine that moves tectonic plates as heated fluid rock rises, cools, and sinks.

Convectional precipitation

Rain or snow caused when intense solar heating of the ground warms the air directly above it, forcing it to rise rapidly, cool, condense, and form heavy convective downpours or thunderstorms.

Cordilleran vegetation

A highly diverse mountain vegetation region where plant communities change dramatically over short distances due to sharp shifts in altitude, slope direction, rainfall, and temperature.

Cultivated plants

Plants introduced, planted, and managed by humans for agricultural or industrial yield (monocultures), often requiring artificial supports like irrigation, fertilizers, and pesticides to survive.

Cyclonic precipitation

Rainfall or snowfall generated when a warmer, lighter air mass is forced to rise up and over a cooler, denser air mass along a frontal boundary.

Deciduous forest / trees

A tiny vegetation region in southwestern Ontario dominated by broadleaf trees (such as maple, oak, birch, and beech) that naturally shed their leaves every autumn and go dormant to preserve energy and moisture during cold winters.

Dew

Liquid water droplets that form directly on cool surface objects at night when calm, clear skies allow surface temperatures to drop.

Differential erosion

The process where softer, weaker rock layers wear away at a much faster rate from wind and water than harder, more durable rock layers nearby.

Distance (Latitude)

The geographic location of a place relative to the equator, determining the angle and concentration of solar energy a region receives.

Drainage

The natural pattern and process of water flowing off the land surface through network channels of rivers, lakes, creeks, and wetlands.

Drowned coastline

A deeply indented coastline formed when the heavy weight of ice age glaciers pressed the land down below sea level, allowing rising oceans to flood low river valleys into deep bays and natural harbors when the ice melted.

Elevation (Altitude)

The height of a landform above sea level; as it increases, atmospheric pressure decreases, causing rising air to expand and cool down.

Eras

The major vertical blocks of time into which geologists divide the Earth's history (Precambrian, Paleozoic, Mesozoic, and Cenozoic).

Erosion

The natural, gradual wearing down of the Earth's physical landscape over time by moving forces such as wind, rain, running water, and glaciers.

Escarpment

A long, steep cliff or sharp face of rock formed where a harder layer of rock overlays a softer layer, resisting erosion and leaving a sharp rise in elevation (such as the Niagara Escarpment).

Faulting

The tectonic process where the Earth's rock crust fractures and cracks under stress, causing blocks of land to shift up, down, or sideways along the fault line.

Fiords (or Fjords)

Long, narrow, steep-sided coastal inlets formed when heavy glaciers carved deep valleys below sea level, which were subsequently flooded by the ocean when the glaciers melted.

Folding

The tectonic process where intense pressure from converging plates causes horizontal layers of the Earth's rock crust to buckle, bend, and wrinkle upward into mountain ridges.

Fossil

The preserved remains, impressions, or traces of an ancient plant or animal that have been naturally preserved and hardened inside sedimentary rock layers.

Front

The boundary zone or line created where two distinct air masses of different temperatures and densities collide.

Frost

Ice crystals that form directly on cool surface objects when moisture condenses at temperatures below freezing ($0^\circ\text{C}$).

Geologic time

The immense scale of history used by scientists to map out the age of the Earth and its structural landmarks over millions and billions of years.

Glaciers

Massive, slow-moving bodies or sheets of ice that act like giant earth-moving machines, scraping, gouging, and carving the landscape as they crawl over the bedrock.

Grasslands

Large, mostly flat plains regions (the Canadian Prairies) where low precipitation levels prevent trees from surviving, allowing various species of grass to dominate the terrain instead.

Great Lakes-St. Lawrence Lowlands

A small lowland region in southern Canada characterized by a flat landscape, glacial hills, deep river valleys, and excellent agricultural soils.

Highlands

Elevated, rugged landform regions containing mountains, plateaus, and rolling hills (such as the Appalachians or Western Cordillera).

Hudson Bay-Arctic Lowlands

A flat, low-lying wetland area covered by swampy forests in the south and frozen islands in the north, sitting on top of ancient Shield rock.

Humus

The dark, rich organic component of soil formed by the decay of plant and animal materials by bacteria.

Ice Age

A cold geologic time frame characterized by a slight cooling of the Earth's climate, resulting in massive, thick sheets of ice advancing across major continental landmasses.

Igneous rock

Rock that is created when hot, liquefied magma or lava cools down and solidifies into a hard mineral structure.

Impervious

A characteristic of a material (like solid bedrock) that does not allow liquids, such as water, to pass through it.

Innuitian Mountains

Stately, icy mountain towers in Canada's far north measuring over $2{,}500\text{ meters}$ in height, composed mostly of sedimentary rock and barren of trees.

Interior Plains

A vast lowland region extending through western Canada, underlain by deep layers of sedimentary rock that create rolling hills and wide, flat river valleys.

Intrusions (Metamorphic/Igneous)

Masses of molten rock (magma) that are forced into or between existing rock layers beneath the Earth's surface, cooling slowly to form rocks containing rich deposits of metallic minerals.

Jet stream (Polar-front)

A high-altitude, fast-moving current of air located high above the polar front that flows from west to east at speeds between $300$ and $500\,\text{km/h}$, helping steer storm paths.

Leaching

A chemical nutrient-removal process that occurs in wet, high-precipitation climates where excess rainwater moves downward through the soil, dissolving and washing away vital minerals out of the reach of plant roots.

Lignite

A soft, low-grade form of brown coal found within the sedimentary rock layers of the Hudson Bay-Arctic Lowlands.

Loam

The ideal, well-balanced soil mixture composed of sand, silt, and clay along with rich humus.

Long-grass prairie

A sub-region of the grasslands that receives increased precipitation, encouraging the growth of taller grasses and creating some of the richest black humus soil in Canada.

Lowlands

Low-lying, relatively flat landform regions typically underlain by sedimentary rock (such as the Interior Plains or Great Lakes-St. Lawrence Lowlands).

Maritime climate

A climate type heavily influenced by its proximity to an ocean, featuring a small annual temperature range and relatively high precipitation.

Meltwater

Water that is produced directly by the melting of glacial ice and/or accumulating snow packs.

Mesozoic era

The middle era of Earth's geologic history (lasting from about $245$ to $66\text{ million}$ years ago), known as the "Age of Reptiles" when dinosaurs ruled, the Rocky Mountains began to form, and shallow inland seas periodically covered parts of Western Canada.

Metamorphic rock

Rock that has been fundamentally altered from its original form (igneous or sedimentary) by intense exposure to underground heat and pressure.

Metallic minerals

Valuable minerals containing metals—such as gold, copper, nickel, lead, and zinc—that are found heavily deposited inside the ancient rock of the Shield.

Mixed forest

A major transition zone forest region situated between the boreal forest to the north and deciduous forests to the south, containing a blend of both coniferous and deciduous tree species.

Moderating effect

The stabilizing influence that large bodies of water have on nearby land climates, preventing extreme temperature shifts (keeping winters milder and summers cooler).

Moisture

Water absorbed into the soil profile that dissolves chemical nutrients so they can be easily taken up by plant roots. One of the 4 main parts of soil.

Natural vegetation

Plants that naturally grow, reproduce, and adapt over long periods of time within a specific geographic area entirely without human work, care, or interference.

Near water (Proximity to water)

The closeness of a region to oceans or major lakes, which regulates regional temperatures due to water's slow heating and cooling rates.

Non-metallic minerals

Minerals that do not contain metals (such as coal), which are highly abundant within the sedimentary rock layers of the Appalachian region.

Nutrients

Essential chemical elements (such as calcium, phosphorous, and potassium) released into the soil from parent rocks that are dissolved in water and absorbed by plant roots for growth.

Ocean currents

Large streams of water flowing through the oceans in a regular pattern that directly influence the temperature of the air passing above them.

Paleozoic era

The second oldest geologic era, lasting roughly $325\text{ million}$ years, during which ancient bedrock foundations formed for every province.

Pangaea

The ancient supercontinent ("all land") that existed roughly $300\text{ million}$ years ago, consisting of all the Earth's landmasses huddled together before it began breaking apart.

Parent material

The rock or mineral deposit from which a soil is originally formed through weathering processes. result of weathering and decay

Parkland

The natural transition zone ecosystem that sits between the dry, open grasslands to the south and the thick, dense boreal forest to the north, characterized by open grass landscapes dotted with clusters of trees.

Permafrost

Ground or subsurface soil layer that remains completely frozen at or below $0^\circ\text{C}$ for two or more consecutive years.

Plate tectonics

The modern overarching geological theory stating that the Earth's outer shell is broken into roughly twenty massive, rigid plates that move slowly over a weak, hot layer of rock beneath the crust.

Plateaus

Elevated, relatively flat areas of land that rise sharply above the surrounding territory.

Polar front

The continuous, shifting boundary zone where cold, dry polar air masses from the north collide with warm, moist tropical air masses from the south.

Precambrian era

The earliest and longest block of geologic time, lasting from roughly $4{,}600\text{ million}$ years ago to $570\text{ million}$ years ago, accounting for roughly $87\%$ of the Earth's entire history.

Prevailing winds

The most well-established, dominant direction from which winds blow over a specific region of the Earth (such as the "Westerlies" in Canada).

Rain shadow

A very dry region found on the leeward (sheltered) side of a mountain range, created because descending air becomes compact, warm, and holds onto its moisture instead of releasing rain.

Relief

Differences in elevation across the Earth's surface (such as hills, valleys, and mountain ranges) that act as physical barriers to moving air masses.

Relief precipitation

(Orographic) Rainfall or snowfall created when moving moisture-rich air is physically forced to rise over a mountain barrier, cooling and condensing on the windward slopes.

Rift valley

A long, narrow valley formed when the land drops down between parallel geological faults due to the cracking and moving of the Earth's crust.

Sedimentary rock

Rock created over millions of years as layers of loose sediment (like sand, silt, or organic remains) accumulate in bodies of water and are compressed and cemented together by immense weight.

Sediments

Loose mineral particles or organic materials—such as sand, clay, silt, and gravel—that are broken down by weathering and transported by water, wind, or ice.

Shield

A massive, stable core region of very ancient igneous and metamorphic rock that forms the physical backbone of a continent.

Short-grass prairie

The single driest sub-region of the grasslands, dominated by shallow-rooted short grasses, drought-resistant sagebrush, and cacti growing in calcified soils.

Sod

A thick, tightly intertwined mat of live grass roots and topsoil that absorbs and stores water efficiently, while protecting the dry prairie floor from erosion.

Soil

The naturally occurring layer of top material on the Earth's surface in which plants grow, fundamentally composed of a mixture of minerals, bacteria/organic matter, air, and moisture.

Soil profile

A vertical cross-section through the soil layers from the surface down to the underlying parent rock, revealing distinct layers known as horizons.

Temperature range

The calculation found by subtracting the lowest average monthly temperature from the highest average monthly temperature of a specific location.

Topography

The natural surface features and shape of a physical landscape, including its variations in elevation, soil structures, vegetation, and water patterns.

Topsoil

The uppermost, highly fertile layer of soil (the "A" Horizon) which contains the highest concentration of organic matter, humus, nutrients, and living organisms.

Transition zone

A broad geographic boundary region where the environmental traits of one ecosystem or vegetation zone gradually change and blend into the next, rather than shifting abruptly at a sharp boundary line.

Tree line

The strict geographic or altitudinal boundary line beyond which environmental conditions (extreme cold and lack of moisture) are too harsh for trees to survive and grow.

Tundra

Canada's northernmost vegetation region, located entirely above the tree line, featuring thin soils layered over permanent ice, restricting vegetation to low shrubs, mosses, and lichens.

Weather

The day-to-day, short-term characteristics of atmospheric conditions—such as temperature, precipitation, wind speed, and humidity—at any given moment.

West Coast Forest

A highly lush temperate rainforest ecosystem located along the coast of British Columbia, supporting massive coniferous trees due to mild marine temperatures and exceptionally heavy rainfall.

Western Cordillera

A rugged highland landform region along Canada's western rim, made up of geologically young, jagged mountain ranges, deep valleys, and high plateaus.

Wind

Horizontal air movement along the surface of the Earth traveling from zones of high-pressure toward zones of low-pressure.