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Unit 2 Weather and Climate

VIEWS: 27 PAGES: 22

									      Unit 2
Weather and Climate
     Chapter 6
   Pages 56 to 79
           Outcomes 2.1 and 2.2:
           Weather versus Climate
Student Discussion/sharing:
1. What is the difference between weather and climate?........

2. Identify the atmospheric conditions which make up
   weather and climate………..

3. Identify if the following examples given by the teacher are
   weather statements or climate statements…….

4. Demonstrate your understanding of weather and climate
   by sharing examples of weather and climate statements
   with your group members.
   Outcome 2.3: Dewpoint and
         Saturated Air
1. What different states can water be in?.......
(water vapor, water droplet and solid)
2. What is condensation?....
(water vapor changing to a water droplet)
3. What is dewpoint?.....
(temperature at which condensation occurs.)
4. What is saturated air?....
(air which cannot hold any more water vapor at that temperature.)
  Important Characteristics of Air
Which statements about air are TRUE?
1. Warm air is lighter than cooler air and will
   therefore rise above it.
2. Cooler air can hold less moisture than warmer
   air.
3. As air ascends (rises above sea level) it will
   warm.
4. As air descends (falls closer to sea level) it will
   warm.
5. As air rises and cools, it can hold less moisture.
    Outcomes 2.4, 2.5, 2.6 and 2.7:
    Different types of precipitations
• Precipitation can fall in the form of rain, hail,
  sleet and snow.
• What are the three types of precipitation?
               • Orographic or Relief Precipitation
               • Convectional Precipitation
               • Cyclonic or Frontal Precipitation
 Orographic or Relief Precipitation
• Watch youtube video and observe diagram of
  orographic precipitation via internet.
• On Educypedia webpage (saved as favorites) view diagram
  of orographic precipitation under weather images and
  animations icon.
• Student Activities:
      1. Alone, or in groups, sketch and label a
      diagram of orographic precipitation.
      2. Where in Canada would you experience
      orographic or relief precipitation?
      3. What is the difference between the windward
      and leeward side of the mountain, especially in
      reference to the amount to precipitation received?
       Convectional Precipitation
• Watch youtube video and observe diagram of convectional
  precipitation.
• Google convectional precipitation animation via internet.

• Student Activities:
      1. Alone, or in groups, sketch and label a diagram of
      convectional precipitation.
      2. Where in Canada would you experience convectional
      precipitation?
      3. Can convectional precipitation occur in Canada during
      the winter? Explain why or why not.
  Cyclonic or Frontal Precipitation
• Watch youtube video and observe diagram of cyclonic
  precipitation.
• On Educypedia webpage, view diagram of frontal
  precipitation under.
• Student Activities:
      1. Alone, or in groups, sketch and label a diagram of
      cyclonic precipitation.
      2. Where in Canada would you experience cyclonic
      precipitation?
      3. Can cyclonic precipitation occur in an area if you
      only have one air mass? Explain why or why not.
      4. What is the most common type of
      precipitation in our local area?
   Outcome 2.8: Climatic Regions of
              Canada
• Watch one of the many videos demonstrating
  Canada’s diversity: “Through the Breadbasket” on
  Aliant.net. (get pass the flaky production and you
  will watch some interesting facts)
• Complete map activity for the seven climatic
  regions of Canada. For each region, write two
  key points on the back of each map. (pg. 68).
• Illustrate, through internet maps that there are
  many variations for the number of climatic zones
  in Canada.
      Outcomes 2.11 and 2.12:
   Temperature Range, Maritime and
        Continental Climates
• Temperature range means……..
     • Difference between the high and low temperatures.
     • -20 and +14 the temperature range is…..
     • +2 and +30 the temperature range is…..
• Maritime Climate is….
     • a climate which is influenced by closeness to the ocean
        (cool summers and mild winters because water cools
        and heats slowly).
• Continental Climate is….
     • a climate which is NOT influenced by water because it is
        located in the interior of the continent, away from the
        moderating influence of the ocean. (hot summers and
        cold winters because land cools and heats quickly).
     • Con’d
  Temperature Range, Maritime and
    Continental Climates (Con’d)
• Classroom Discussions:
• Identify a Canadian location with a maritime
  climate; a continental climate.
• Which climate would have a greater annual
  temperature range, a maritime climate or a
  continental climate? Explain why.
• Which climate would have greater annual
  precipitation, a maritime climate or a
  continental climate? Explain why.
    Outcome 2.9: Climate Graphs
• What is a Climate Graph?........
      • Graphical representation of temperature and
        precipitation for a specific location. Temperature is
        written on the left hand side and precipitation is
        written on the right hand side. Temperature is
        shown by a red line and precipitation is shown by
        blue bars.
      • Demonstrate the construction of a climate graph
        by going through the shockwave flash “tutorial for
        drawing climate graphs” via the internet.
      • Con’d
          Climate Graphs (Con’d)
• How do you calculate the average temperature for the
  year?.....
       • Add up all of the temperatures and divide by 12.
• How do you calculate the total precipitation for the
  year?.....
       • Add up all of the precipitation values for each month.
• How do you know the season of maximum
  precipitation?....
       • Add up the precipitation totals for each season
       • Example: Summer would be July, August and September.
• Student Group Activity:
• Complete the climate graphs worksheet. (handout)
   Outcome 2.12: Factors Affecting
              Climate
• The following factors work together to
  influence the weather and climate of Canada:
     • Latitude
     • Elevation (altitude)
     • Ocean Currents
     • Relief (Mountain Barriers) (already covered with
       orographic or relief precipitation)
     • Air masses (wind)
     • Moderating influence of water (nearness to water)
• Con’d
        Factors Affecting Climate
• Latitude:
• What do we mean by a high latitude in Canada?......
      • Greater distance north of the equator. (equator = 0 latitude and
        north pole= 90 latitude)
• Why do temperatures tend to decrease as latitude
  increases (ie: Higher latitude)?....
      • Curvature of the earth resulting in less direct sunlight. When the
        sunlight does reach it is more spread out.
      • Increased distance of travel as you go further north due to the
        curvature and tilt, resulting in less intense heat.
• Illustrate latitude and temperature graphically. (Is
  there a negative or positive relationship?)
 Factors Affecting Climate (Con’d)
• Elevation (Altitude):
• What do we mean by elevation?.....
      • Height above sea level. (sea level is at 0m
        elevation)
• Why do temperatures tend to decrease as
  elevation increases?.....
      • As air rises from sea level, it expands and in this
        process heat is lost.
• Illustrate elevation and temperature graphically.
  (Is there a negative or positive relationship?)
 Factors Affecting Climate (Con’d)
• Ocean Currents:
• What three dominant ocean currents do we
  experience in Canada?......
     • Labrador Current, Gulf Stream and Pacific
       Current.
• What is the influence of each of these currents
  on temperature?......
     • Labrador Current (Cold)
     • Gulf Stream (Warm)
     • Pacific Current.(Warm)
 Factors Affecting Climate (Con’d)
• Air Masses (Wind):
• What causes air to move?.......
      • The presence of high (cooler air) and low (warmer air)
        pressure.
      • Illustrate how air moves from high to low pressure via
        internet image
• What is meant by a prevailing wind?.....
      • The dominant or most common wind experienced in an
        area.
• What is the prevailing wind of Canada?.....
      • westerlies
 Factors Affecting Climate (Con’d)
• Nearness to Large Bodies of Water:
• What do you know about the moderating
  influence of water from summer to winter versus
  living inland away from water?........
        • Water takes longer to heat up in spring/summer
          and cool down in fall/winter than land. Coastal
          areas will have cooler summers and milder winters
          than inland areas due to this reason.
• Which area will have a larger, annual temperature
  range…. Coastal area or inland area?...
        – Inland area because land cools and heats faster
          than land.
        – Illustrate with map of summer and winter
          temperatures.

								
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