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Fresh Water 01: Surface Water
Transcript of Fresh Water 01: Surface Water
By: Georgeiannacash Guido
Introduction: Using models is very important in science. In this lab, you will design a model that will help you investigate the relationship between land surfaces and water on Earth.
Title: Wad a Watershed Lab
Objective: To design a model that will help you visualize watershed characteristics.
Problem: How can we use the relationships between land surfaces and water to understand conservation of resources and pollution.
Hypothesis: In your own words, write a hypothesis about how the relationships between land surfaces and water to understand conservation of resources.
Water that is flowing from higher land surfaces will carry pollution all the way down to the lower land and pool there.
Data and Observations: Write a very detailed description of your watershed model. Include observations based on the shape of the paper, behavior of water within your model and overall impression. Be sure to use terminology from your lesson and your own words in this description and include pictures.
MATERIALS AND PROCEDURES:
one sheet of plain white paper
several sheets of old newspaper, or wax paper if available
one water-based marker (Note: do not use permanent marker)
one spray bottle containing water (place on “mist” setting)
digital camera, if available
Place several sheets of newspaper over a large flat surface, such as a kitchen counter. Use at least five sheets of paper so that you can protect your work area. If it is available, you may use wax paper instead of newspaper.
Crumple the sheet of white paper into a loose wad.
Uncrumple the sheet of paper so you can lay it on your work surface. The paper should not be flat, but should be wrinkled and puffed up from the crumpling.
Imagine the paper as a miniaturized version of mountains, hills, valleys, and other landscape features. If your paper is so flat that you can't imagine these features, you should recrumple it.
Use the marker to color the major folds or ridges in the paper, as well as some of the minor folds or ridges, as shown below. Do not allow the marker to color any other part of the paper.
Place the paper on top of the newspaper on the counter, and then lightly mist the piece of paper with the spray bottle. Don't spray too heavily: Three to seven squirts will probably do the job.
Stop misting as soon as you see some of the colored water starting to collect in some of the valleys. Watch for a few moments as stream patterns develop over the paper.
If you have access to a digital camera, take a photograph of your work and include it in your Data and Observations.
Use your observations in this activity to answer the reflection questions in the Analysis and Conclusion section of your lab report, and then submit the completed report to your instructor.
ANALYSIS AND CONCLUSIONS:
In your own words, write an analysis of the watershed model you created.
With each spray across the paper the ink from the marker started to drip down. As it went down the imaginary hills/mountains the ink started to pool down into the valleys and I could see how all the streams began to connect with the more water that I sprayed.
1. View this animation clip to take a closer look at the Mississippi watershed
Notice that the clip is silent. In your own words, describe what is happening in this animation. Be sure to explain how this animation compares to your lab experience.
2. In your own words, identify and describe all the ways water moved throughout this lab activity. Use scientific terms, when possible.
3. Based on the definition of watershed, how many different watersheds were there in your model?
-Explain how you determined this number.
-Use terms from the lesson to describe your watershed model.
-If you were able to take a photograph of your paper, include a copy of this photo and label each of your watersheds in the model.
4. Earth’s landscape can change over time. What can happen to a watershed as a result? Explain your response in your own words and include terms from the lesson.
5. Based on what you observed in the lab, why is pollution never a strictly local problem?
The water started from the first source and then drained down to other places. This happened in different parts of the paper as well.
When the water was sprayed on the top of the hill it began to drain down and created a pool where the paper was lower as it would in lower altitude places. There were parts where the water connected with other major "water sources." The water trickled down the imaginary hill and mountains and would fall together in many spots.
There are four main watersheds that I found. I determined this number by looking where the webs of water mainly trickled down from and where the highest hill were.
A watershed can change and merge with other water sheds or can potentially fully drain out or get bigger with runoff from other places.
Pollution is never strictly a local problem because pollution can be drained from other places and end up in a total different place than where it began. For example, in the activity the ink from the paper began to run down and pool into the center, pollution has the potential to do the same thing.