Web Lesson 8
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Web Lesson 8 |
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To complete this activity simply answer the questions below in the text box and send them to your instructor. Use your textbook pages 9-15 and the sites provided to help you answer the questions. Familiarize yourselves with all the questions before you visit the sites listed below. 1. Scientists believe that the ancestors of the northwest salmon and trout have existed for how long? 2. What sort of physical disruptions did salmon face before humans arrived in North America? 3. About 9,000 years ago, the Pacific Northwest became a great place to be a salmon. What 3 things happened around that time to help improve salmon habitat? 4. What is it about the Columbia River that allowed salmon to become the main food source for Native Americans for thousands of years? 5. Why do natural disasters (forest fires, mudslides, etc.) effect salmon more now than in the past? 6. How has flooding affected salmon? 7. Describe how scientists have developed the chart on page 13 of your textbook, Field Guide to the Pacific Salmon. 8. What are the common names of Oregon's ocean-going salmon? 9. How do ocean and stream temperatures affect salmon populations? Useful Links:
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