Stream Morphology Laboratory

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Week1LabWorksheet_690897205.docx

Lab Worksheet

2 Carolina Distance Learning

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Hypotheses

Activity 1.

Sinuosity hypothesis:

Velocity hypothesis:

Relief hypothesis:

Gradient hypothesis:

Activity 2.

Sinuosity hypothesis:

Velocity hypothesis:

Relief hypothesis:

Gradient hypothesis:

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ACTIVITY

Lab Worksheet continued

Observations/Data Tables

Data Table 1.

Trial

Sinuosity

Velocity (cm/s)

Relief (cm)

Gradient (cm)

Thicker Book

1

2

3

Thinner Book

1

2

3

Data Table 2.

Variable changed: Book thickness used:

Trial

Sinuosity

Velocity (cm/s)

Relief (cm)

Gradient (cm)

1

2

3

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Calculations

Activity 1. Sinuosity:

curvy distance (cm)/straight distance (cm) = sinuosity (no units)

Activity 2. Sinuosity:

curvy distance (cm)/straight distance (cm) = sinuosity (no units)

/ = / =

Both the curvy and straight distances are measurements taken from the stream formation in the stream table. Please refer to Activity 1 for more details.

Velocity:

distance traveled (cm)/time it takes to travel (s) = velocity (cm/s)

Both the curvy and straight distances are measurements taken from the stream formation in the stream table. Please refer to Activity 1 for more details.

Velocity:

distance traveled (cm)/time it takes to travel (s) = velocity (cm/s)

/ = / =

The distance a small piece of paper travels downstream divided by how long it takes to get downstream is the velocity. Refer to Activity 1 for more details.

Relief:

highest elevation (cm) – lowest elevation (cm) = relief (cm)

The distance a small piece of paper travels downstream divided by how long it takes to get downstream is the velocity. Refer to Activity 1 for more details.

Relief:

highest elevation (cm) – lowest elevation (cm) = relief (cm)

– = – =

Subtract the lowest elevation of the stream from the highest elevation of the stream to calculate the relief. Please refer to Activity 1 for more details.

Gradient:

relief (cm)/total distance (cm) = gradient (cm)

Subtract the lowest elevation of the stream from the highest elevation of the stream to calculate the relief. Please refer to Activity 1 for more details.

Gradient:

relief (cm)/total distance (cm) = gradient (cm)

/ = / =

Divide the relief by the total distance of the stream to calculate the gradient. Please refer to Activity 1 for more details.

Divide the relief by the total distance of the stream to calculate the gradient. Please refer to Activity 1 for more details.

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ACTIVITY

Lab Worksheet continued

Photographs

Activity 1.

Activity 2.

Lab Questions

Please answer the following entirely in your own words and in complete sentences: Introduction

1. Background—What is important to know about the topic of this lab? Use at least one outside source (other than course materials) to answer this question. Cite the source using APA format. Answers should be 5–7 sentences in length.

[Write your answers here]

2. Outcomes—What was the main purpose of this lab?

[Write your answers here]

3. Hypotheses—What were your hypotheses for Activity 1? What were your hypotheses for Activity 2? Identify each hypothesis clearly, and explain your reasoning.

[Write your answers here]

Materials and Methods

4. Using your own words, briefly describe what materials and methods you used in each of the activities. Your answer should be sufficiently detailed so that someone reading it would be able to replicate what you did. Explain any measurements you made.

[Write your answers here]

Discussion

5. Based upon the results of each activity, explain whether you accepted or rejected your hypotheses and why.

[Write your answers here]

6. What important information have you learned from this lab? Use at least one outside source (scholarly for full credit) to answer this question. Cite the source using APA format.

Answers should be 5–7 sentences in length.

[Write your answers here]

7. What challenges did you encounter when doing this lab? Name at least one.

[Write your answers here]

8. Based upon your results in Activity 2, what next step(s) might a scientist take to explore how humans affect stream ecosystems?

[Write your answers here]

Literature Cited

9. List the references you used to answer these questions. (Use APA format, and alphabetize by the last name.)

[Write your answers here]

Now copy and paste your answers into the Lab Report provided. Include the data tables and photographs. You may wish to make minor edits to enhance the flow of your resulting lab report.