Lab 1: Earth Systems and Earth’s Four Spheres

Allison Lutz and Crystal Huscroft

In this introductory geography lab you will become familiar with the local geography and begin to think like a geographer.

This lab includes two exercises that result in creating an assignment to be handed in as a report in PDF format. The submitted report will include a series of figures with captions. The entire lab will take approximately 2 hours to complete.

Exercise 1 is mostly field-based, whereas Exercises 2 is office-based. The field “sketch map” should take approximately half an hour to complete. The rest of the lab will take the remaining time.

Contact your instructor for an alternative approach to these exercises if you are experiencing mobility or visual constraints.

Why this lab activity?

Both professionals and researchers can tell a lot about the physical processes operating on a landscape by carefully observing it.  This lab will connect you with the geography of the place in which you live and hone your landscape observation skills. It is an important skill to describe the more natural and anthropogenic features of the landscape, and to consider ways in which a change in one aspect may affect all others. It is only as we seek to understand the interconnectedness of Earth spheres and systems that we will find appropriate solutions to our global environmental issues.

Your lab instructor will guide the class through these steps, but it’s important to get an overview of what you will be asked to do so that you come prepared.

Learning Objectives

After completion of this lab, you will be able to

  • Orient a map to the landscape.
  • Draw a simple sketch map.
  • Name and identify natural and built features of the local area.
  • Observe and record characteristics of the local atmosphere, lithosphere, hydrosphere, and biosphere.
  • Describe the anthropogenic impacts on natural systems.
  • Examine examples of positive and negative feedback systems at work.
  • Describe potential changes to natural systems.

Pre-reading

Vocabulary

Our natural environment can be broken down into four interacting and overlapping “spheres”. In this lab you will be asked to note evidence of processes occurring within these spheres, so it is important to review them and think of possible signs in the landscape of how they operate and have produced the landscape you will observe.

The hydrosphere consists of water in all its forms (solid, liquid, and gas; fresh and salty), as it appears at or near the Earth’s surface. It includes oceans, rivers, lakes, springs, glaciers and ice caps, shallow groundwater, and atmospheric water vapor.

The atmosphere is a mixture of gases, forming an envelope around the Earth, and held in place by gravity. Up to an altitude of about 80 km the composition is nearly constant at 21% oxygen, 78% nitrogen, and traces of argon, xenon and krypton. In addition, there are variable quantities of carbon dioxide, methane, and water. We are most interested in the troposphere, the lower 18 km where weather and climate are determined.

The lithosphere is the upper mantle and the Earth’s crust that create landscape features such as mountains and valleys.

The biosphere includes all living things and their physical environment. It extends from several kilometers below the sea floor to about 8 km above the surface and requires the presence of water as well as an energy source of some kind. The range for individual species within the biosphere can change as local conditions within the other spheres change. (Christopherson, R.W. & Byrne ML).

Anthropogenic: This adjective means human (anthro-) created (genesis). Anthropogenic impacts are impacts caused by human activity.

Lab Exercises

Required materials:

  • Camera (cell phone is fine).
  • Pencil
  • clipboard or a hard surface like a large book to draw on
  • 2 blank pieces (in case you want to restart) of unlined paper to draw on – fine to be the back of a used piece (save paper!).
  • Appropriate clothing for the weather.

Required lab  software (loaded on lab room computers):

  • Google Maps
  • Word processing software (Word, Google Docs)

EX1: Field Drawing

Step 1: Select Your Location or portion of the view that you will map

Start by choosing a field area and with a safe and easily accessible place where you can view the landscape from above as much as possible.  Then open Google Maps on your phone or computer. Zoom into the area you will be viewing in the field. If you are on a desktop computer you will need to print the map, otherwise refer to the map on your phone or tablet while in the field. It will be helpful to watch the following two minute video:

  • camera (cell phone is fine)
  • clipboard, some blank pieces of paper, and a pencil, and
  • a digital or printed copy of the lab exercises.
  • optional: a smartphone with a map app (like Google maps)

Step 2: Orient Your Map

Figure 1.1. Student stands at a viewpoint on grassy hill overlooking the confluence of the Kootenay River and Columbia River. Source: A. Lutz, CC BY-NC-SA

Once you have arrived at your viewpoint you will need to orient yourself to your location. Open a map of where you are on your phone or tablet or pull out the paper copy of the map.

  • Find your location on the map. If you are on Google Maps this is easily done by pressing the small arrow. Zoom in or out to view the map at a scale that reflects what you can see in the landscape.
  • Find features on the map that are evident in the surrounding terrain.
  • Turn your map (phone) so that the features in front of your view match the features on your map.
  • Determine the direction you are looking.

Step 3: Frame Your Field Sketch (Figure EX1.2)

You may be new to this area of British Columbia or you may have lived here your entire life; regardless, you can build your geographic literacy by being able to name and describe the natural and built features of the surrounding landscape.  We will want you to label a few.

Find a suitable viewpoint and spend a few moments observing the landscape (see Figure 1.1).

Decide on an area that is appropriate to capture in your sketch. It may be a valley bottom with a  river running through it or you could narrow in on a smaller area such as your neighborhood.

Photograph the landscape from your position. With annotation, this photograph will become Figure EX1.1 in your lab report (see example Figure 1.2).

Figure 1.2. Example Figure EX1.1. Looking south over Castlegar Valley from Brilliant Terraces. The area for the sketch map is identified with a rectangle. Source: A. Lutz, CC BY-NC-SA.

Step 4: Create Your Field Sketch (Figure 1.3)

Sketch and label the area you identified based on your observations. You do not need to be an artist to complete a field sketch. The most instructive field sketches are simple with clearly defined lines.  This is an observation exercise, so only include features that you are able to observe.

The following are important elements to consider as you draw your sketch. Refer to Figure 1.3 for a sample sketch map.

  • Clearly define the boundaries or edges of your sketches. Mountains, watersheds, shorelines, roads and railways tend to define our vision and are commonly used as edges.
  • Indicate the scale of your sketch. The scale of a sketch is determined by the size of the objects in view and the amount of detail required to be shown. Determine how much area you want to draw. From the viewpoint, the area in the rectangle on Figure 1.2 was selected for the sketch.
  • Identify observed pathways or routes which dissect your selected area such as roads, trails, rivers, streams, power lines. We generally experience our surroundings as we move along these routes. Show direction of travel of rivers with an arrow.
  • Identify any observed significant junction points where important pathways come together. The confluence (meeting) of two streams, the intersection of two roads.
  • Identify polygons or districts. These are small areas with a common feature, such as urban areas, single family housing, parks, open fields, changes in vegetation type (from leaf bearing/deciduous to needle bearing/coniferous) etc.  you can give them symbols or a common texture.
  • Identify any significant landmarks that are distinctive because of their height, shape, or historical significance. An example might be a well-known mountain peak, a waterfall, a statue, a mall. (Lynch,1960)
  • For marks, on your map you must also include
    • title/location,
    • date,
    • your name,
    • legend (symbols which indicate vegetation type, mountains, urban areas),
    • direction of view.
    • approximate scale inone ore two locations. Relate the scale to a dimension of your sketch map, as done on Figure 1.3.
Figure 1.3. Example Figure EX1.2. Sketch map of rectangle area from Figure 1.2. Source: A. Lutz, CC BY-NC-SA.

Photograph your sketch map before leaving the field.

Step 5: Document Your Field Work with Photographs (Figure EX1.3)

Please take two photos in addition the the photo of your map area.  First, take a selfie (photograph of yourself) at the field site holding your field sketch.  Be sure to include a bit of the background landscape to show where picture is taken.  Secondly, take a photograph of your map such that your map takes up most of the area of your picture, but still includes enough of the background so that it is obvious the picture was taken while you were still in the field.

Step 6: Create the Exercise 1 Portion of Your Lab Report

Once you are back inside, open a Word document on your computer, and create a title page for your lab report that includes the title of this lab assignment, your name, your lab instructor’s name, lab section number, and date.

Create the Exercise 1 portion of your lab report by inserting the title “Exercise 1: Field Sketch” and insert the figures you created in the field:

  1. Figure EX1.1: Photograph with markup of the frame of your field sketch. Insert the photo as a picture, and add a rectangle to indicate the boundary of your field sketch.
  2. Figure EX1.2: Field sketch. Insert the photo of your field sketch enlarged as much as possible to fit on an 8.5×11″ sheet of paper.
  3. Figure EX1.3: Documentation of field work. Insert your selfie.

Add descriptive captions to each figure to complete this portion of the report.

 

EX2: Anthropogenic Impacts

  1. Specific to the entire view of the landscape you are observing, describe how anthropogenic impacts could alter each of the 4 spheres (Hydrosphere, Biosphere, Atmosphere, Lithosphere). Please title each sphere and mention at least 2 anthropogenic impacts for each sphere. Consider both the immediate and long-term impacts. It might be helpful to look ahead in your textbook for ideas. Word count (approx. 250). 
Table 1.2. Considering Anthropogenic Impacts
Sphere
Hydrosphere  

 

Atmosphere  

 

Lithosphere  

 

Biosphere  

 

 

 

Reflection Questions

In answering the following questions, if applicable, be sure to connect your learning to your past lived experience and any future learning.

  1. Now that you have completed a field sketch, describe how this process differs from simply printing a map or taking a photograph to note evidence of processes shaping the landscape. (1-2 sentences)
  2. What information could be conveyed on a field sketch map that is not available on photographs, remotely sensed images or a published government map? (3 sentences)
  3. Describe “the sense of place” this area has for you; this will be different for each student depending on your life experiences. For example, are you connected to this landscape? Are you concerned or optimistic about how the landscape is changing? Try to be honest here, do not write what you think your instructor is looking for. (3-5 sentences)
  4. Please describe at least one aspect of the features that you observed that you are curious about.

Create a new section of your lab report titled “Reflection Questions” and type in your answers.

Report Submission

Once all exercises are complete, save the assignment as a PDF and submit as directed by your instructor.

 

References

Christopherson, R.W. & Byrne ML. 2016. Geosystems, An Introduction to Physical Geography, Canadian 4th Edition, Toronto: Prentice-Hall Inc.

Lynch, Kevin. 1960. The Image of the City. MIT Press.

Media Attributions

  • Figure 1.1 Viewpoint © Allison Lutz
  • confluence view2
  • CASTLEGAR

License

Icon for the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License

Laboratory Manual for Introduction to Earth System Science, First Edition Copyright © 2021 by Allison Lutz and Crystal Huscroft is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.