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Discussion Questions and Observations:
1. How did the path of the stream change?
2. Why does this phenomenon occur?
3. Where did the channel's width change most rapidly?
4. What landform develops at the mouth of the stream and why?
5. What elements are missing from the model that might affect how a stream channel might change paths?
6. How might geologic and human-made structures affect the changing path of the stream? Consider specific examples.
How could you test your predictions using the Stream Table?
Extend the Activity:
1. For an elevated experience, try replicating this experiment with different types of sediments.
• How did the results change?
• Was this expected?
2. Use the stream table to simulate different scenarios, such as the effects of pollution, dam construction, or changes in land use.
• How do changes upstream affect the downstream environment?
3. Consider integrating art, writing, or other subjects by having students create presentations, reports, or models based
on their findings.
Teaching Notes:
Things to consider:
• Prepare all necessary materials and equipment, such as stream tables, sand, water, pebbles, and any tools needed
to modify stream channels.
• Consider the setup and cleanup time required for the activity and plan accordingly.
• Ensure the table is set up so all students can observe and participate in the experiment.
• Test the setup beforehand to anticipate any potential issues, such as leaks or inadequate flow.
• Modify the activity to be accessible for all students, including those with physical disabilities or learning differences.
• Encourage teamwork and ensure every student has a role in the activity, promoting collaboration and peer learning.
• Provide background information and context about why studying streams is important, such as their role in ecosystems,
their impact on human settlements, and their relevance to environmental science.
Disposal/Clean-Up:
Follow the clean-up instructions provided with your stream table. If the sand or other materials have been washed away
or degraded, replenish them as needed to be ready for future demonstrations.
Exploring Changes in a Stream Channel (continued)
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