hw 3 lab 6

hw 3 lab 6

Asked by 5 years ago
389.5k points

Soil Texture

Ecosystems and Biomes



  1. Complete all questions
  2. Use the accompanying notes, your text and the Internet as a reference.
  3. Turn in your completed lab to the drop box marked Lab 6.


Note: For all three labs, you may work with other students, but all answers must be in your own words. You will be asked to do questions similar to these on the lab quiz, which will be timed. If a classmate explains an answer to you, be sure to rewrite the answer in your own words. If you cannot do this, then you do not yet understand the material well enough to properly answer the question__.

1.Soil Texture

  1. 1. The soil texture triangle is used to classify soil separates into a specific soil type.  Each side of the triangle represents the percent of silt, clay or sand in the sample. 
  2. Fill in the table below using the soil texture triangle.  Samples A and B are labeled on the triangle and sample A is done for you.


% Sand

% Silt

% Clay

Texture Class










Sandy clay loam

















  1. Plot the location of samples C, D and E on the soil texture triangle below.



Figure 1 source: Geosystems Lab Manual, Christopherson and Thompson



2.Ecosystems and Biomes

  1. Use Figure 2. below, and Chapters 19 and 20 in your text as a reference, to prepare a map of global biomes.  (Label only the major subdivisions, add title and legend)


  1. Visit each location in the table below. Use the textbook, Google Earth and other resources at your disposal to fill in the table.


Location (degrees)



Soil Order (U.S.)

Climate Type (Koppen)

Precipitation Range (cm / yr)

10 S, 65 W






30 S, 20 E






34 S, 116 E






31 N, 85 W






50 N, 105 W






50 N, 70 W






70 N, 80 E






51 N, 0 E






12 S, 142 E







GEOG1120 Assignment 3


  1. 1. Work on these questions systematically week, as you complete the readings and quizzes for each chapter.
  2. 2. Answer ALL questions, and submit your completed assignment to the Assignment 3 drop box on or before the due date.
  3. 3. Late assignments should be submitted to the late drop box, and will be assessed a 20% late penalty. Late assignments will not be accepted more than 72hrs (3 days) beyond the due date without a doctors excuse.



1. All answers must be in your own words.  Do not copy from the textbook (this is plagiarism unless you use quotation marks and reference your source).  Please see the syllabus for details on the plagiarism policy for this course.

2. You have several options to submit a sketch-- sketch by hand and scan or take a digital picture, or sketch using a drawing program (i.e. Paint - found under accessories in Windows computers).

Chapter 16 questions


  1. Run the Monthly Tidal Cycles animation from the Animation CD.

  2. What is a spring tide?  A neap tide?

  3. What causes tides?
  4. Suppose you live on the coast.  Give two reasons why you might want to know when the high and low tides will occur for your area.

_ _

  1. Develop an exercise geared toward middle school students, that uses the wave machine simulator to investigate the effect of fetch, wind speed and wind duration on wave height. Your deliverable is the activity instructions, a set of questions that your hypothetical class will answer, plus an answer key.


  1. 3. Write a commentary to go along with the series of images of a sea arch collapse in Oregon from 1890-1990 found at  Write your commentary so that it would be a suitable narrative to accompany the images in a self-guided museum tour. Try to be interesting as well as informative, describing the successive changes that appear with each time-lapse image, as well as the science behind the changes. Ideally youll explain whats going on while showing me that you understand whats going on in each image. You should provide a 2-4 sentence commentary for each image.

Chapter 17 questions

  1. Beginning with a pre-glacial stream-cut valley, describe in detail the erosional and transport processes that transform the V-shaped valley into a post-glacial U-shaped valley.


  1. In Google Earth, fly to Algonquin Park, Ontario Canada and view the topography. Next, fly to Glacier National Park and view the topography. The surface topography of both of these areas is a result of glacial activity. Describe each area in terms of its glacial landforms, and explain why they are so different (be specific and feel free to use other resources in addition to Google Earth).


  1. Explain why, unlike deposits left by fluvial and eolian processes, glacial deposits tend to be unsorted.


  1. Three animations found at outline the effect of orbital variations on Earths climate. These are the essential points of the Milankovitch Theory which provides one explanation for the pattern of glacial and interglacials throughout Earths history. Explain how the three orbital variations outlined in the animations can work synergistically to increase glacial ice mass worldwide. Give me sufficient details about each process and how they work together to show me that you understand the link between orbital variations, seasonal variability and glacial advance.

Chapter 18 questions

  1. Make a summary table to help you understand the characteristics of the different soil horizons.  Include differences in color, composition, function and chemical and physical processes.


  1. Soil is the end result of the weathering of mineral matter over time, with the additional influences of biotic activity and climate. Consider the soil forming factors introduced in the textbook. For each of the following locations, discuss the role of the dominant factors in soil formation and suggest an appropriate land use (i.e. agriculture, forestry). Dont forget to back up your answer.


Dominant Soil Type

Soil formation

Recommended land use

Amazon Rainforest





New Zealands North Island





Nevada (US Southwest)





The Hebrides and Isle of Skye, Scotland





Iowa (US midwest)







10.   Regarding the current status of soil erosion in the United States, answer the following:

  1. Which states are most impacted by soil erosion?
  2. Consider one of the following scenarios: i) you are a farmer who is concerned about the loss of topsoil on his property; or ii) you are a land developer who wants to construct a housing green housing development. What steps will YOU take to ensure that soil erosion is minimized, while continuing to reap economic benefit from your land?
hw 3

1 Answer

Answered by 5 years ago
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 hw 3 lab 6

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Excerpt from file: GEOG1120 Earth Science: Landforms and Processes 1 GEOG 1120 EARTH SCIENCE: Landforms and Processes GEOG1120 Online Lab Exercise 6 Soil Texture Ecosystems and Biomes Instructions: 1. Complete all questions 2. Use the accompanying notes, your text and the Internet as a reference. 3. Turn in your

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Asked: 5 years ago