Chapter 2: Canada`s Physical Landscape
Transcription
Chapter 2: Canada`s Physical Landscape
Chapter 2: Canada’s Physical Landscape Name: _________________________ You will be able to: Demonstrate an understanding of the physical geography of Canada. o outline the factors responsible for Canada’s varied topography and landforms o identify and describe Canada’s major landform regions o describe the global and regional factors that account for variations in Canada’s climate regions o identify and locate the major climate regions of Canada Introduction: Canada is the world’s second largest country in area. It borders three oceans and extends across six time zones. Canada is not only geographically large –- it is also incredibly diverse. The size and variety of Canada’s geographic landscape, and the response of the diverse peoples who have inhabited it, have played a significant role in shaping Canadian identity(ies). The physical processes which literally shaped, and continue to shape, present-day Canada are examined in this chapter, and it builds on what you learned in gr. 7 Science. The resulting “stage” on which Canada’s history has played out is explored through an examination of the diverse physiographic regions of the country. The high mountains of British Columbia, the prairie fields of Saskatchewan, the frozen tundra of Nunavut, and the craggy shores of Newfoundland and Labrador have all contributed to shaping Canadian identity and identities. Landforms Describe the layers of the earth: Answer Question 1 on p. 21 1 Describe the process of Continental Drift: o The Earth’s crust is not continuous; it is divided into a number of plates (sections) that move because of slow-moving convection patterns in the mantle (plate tectonics). Over many millions of years (see diagrams on p. 21) the super-continent of Pangaea began to split apart, and is still moving apart today. Describe how tectonic activity has impacted the Earth’s Crust, and in particular Canada’s crust: Answer questions 1 and 2 page 22 2 How are mountains created, and how do they change over time? o When continental plates collide, they can push up mountains. Where plates are moving apart, volcanic action can cause the creation of undersea mountain chains, as found in the Mid-Atlantic Ridge. When plates separate along a fault, the resulting forces can either raise or lower blocks of the crust. o Weathering, erosion, and deposition also help shape our landforms. Weathering and erosion wear-down landforms, where deposition slowly builds up materials over time to form new shapes. These processes take time; the older landform regions in Canada have been affected much more by weathering and erosion than ones formed more recently. Define: Weathering: Erosion: Deposition: Identify Canada’s Eight Landform Regions: o Use the sheets that follow to help summarize what you read about on pages 26 – 31 3 Label Canada’s Landform Regions on the map below. 4 5 Climate and Weather o o Climate is how we describe patterns of weather conditions over the long-term and that there are many factors that affect the climate of a region. There is a strong relationship between climate and Canadian identity; think about your housing, the clothes you wear, and what you do for fun. The global factors that affect climate include latitude, air masses and winds, ocean currents, clouds and precipitation. Describe their affect (pp. 33-36): o The regional factors include altitude, bodies of water, and mountain barriers. Show some examples how these factors make a difference in regions across Canada: o Canada can be split into various climate regions: dry, warm/moist, temperate continental, and polar climates (see the map on page 39). Note the characteristics of each climate zone with regard to temperature, precipitation and relative location within Canada (see page 38-39). Which climate zone do we belong to? Characterize our climate in terms of temperature and precipitation: 6 o Construct a climograph from the data included. Could you identify the region of Canada it may belong to based on the data in the climograph? Construct a climograph (see p. 40) o 7 8 Landform Regions of Canada Canadian Shield Provinces Included Age of Rock Quebec, Ont, Sask, Nunavut, Manitoba, Lab, NWT 4 billion years ago Appalachian NL, Nova Scotia, Mountains PEI, New Western Cordillera Brunswick, Quebec BC, Yukon, part of Alberta Innuitian Mountains Nunavut, NWT Arctic Lowlands Nunavut, NWT Interior Plains Alberta, Sask., Manitoba, NWT Great Lakes- Ontario, Quebec, St. Lawrence Labrador Lowlands Hudson Bay Ontario, Lowlands Manitoba, Quebec Type of Rock Igneous Relief Gradient Process that shaped the area Low relief Low lying areas with rolling hills Largely shaped by volcanoes and glacial movement Mixture of 1000m or igneous, lower metamorphic & sedimentary 65 million years Mixture of all 3000m ago three but mostly metamorphic Rolling hills and broad valleys Steep young mountains with deep valleys The North American and Eurasian plates collided, pushing land upward (folding). Erosion over time Folding and faulting of the earth’s crust (movement of plates) Approx 250 million years (younger than Appalachians) Approx 500 million years ago Mixture of all 2000m three but mostly metamorphic Steep sided valleys and mountains Folding and faulting of the earth’s crust (movement of plates) Sedimentary with igneous underneath Low elevation Rolling hills Formed by sediments deposited by glaciers Approx 500 years ago Mostly sedimentary Low elevation Steep slopes on either side of the plains Formed by sediments deposited by glaciers 10 000 years ago they were drained of seawater Approx 800 million Mostly sedimentary Low elevation Rolling hills Formed by sediments deposited by glaciers Sedimentary with igneous underneath Mainly flat land Rolling hills Formed by sediments deposited by glaciers 375 million years ago 9 Ch. 1 Map Skill: Place the abbreviation (letters) of the province on the map below: Alberta AB British Columbia BC Manitoba MB New Brunswick NB Northwest Territories NT Nova Scotia NS Nunavut NU Ontario ON Quebec QC Saskatchewan SK Yukon YT Newfoundland and Labrador NL Prince Edward Island PE 10