Introduction
Have you ever noticed that the sea level rises and falls at different times of the day? These changes are called ocean tides, and they affect fishing, navigation, and coastal life. In this WebQuest, you will explore how the Moon and the Sun influence ocean tides and why tides change over time. By the end of this activity, you will understand the science behind tides using real information from the internet.
Task
Your task is to explain how ocean tides occur and identify the difference between high tide and low tide. You will create a simple visual diagram or short written explanation showing how the positions of the Earth, Moon, and Sun affect ocean tides. You will also answer guide questions based on your research.
Process
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Read the provided online resources about ocean tides.
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Watch short educational videos to understand how gravity affects tides.
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Identify the roles of the Moon and the Sun in creating tides.
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Create a diagram or short explanation that shows:
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Earth
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Moon
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Sun
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High tide and low tide
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Answer the guide questions:
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What causes ocean tides?
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Why are there two high tides in most places each day?
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How does the Moon affect ocean tides more than the Sun?
Resources:
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https://phet.colorado.edu/ (search for Earth–Moon simulations)
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Evaluation
Your work will be graded using the following criteria:
| Criteria | Excellent (5) | Good (3) | Needs Improvement (1) |
|---|---|---|---|
| Understanding of Tides | Clearly explains tides and their causes | Basic explanation | Limited understanding |
| Accuracy of Information | Information is correct and complete | Minor errors | Several inaccuracies |
| Diagram / Output | Clear, well-labeled, and neat | Some labels missing | Unclear or incomplete |
| Effort and Completeness | All tasks completed | Most tasks completed | Tasks incomplete |
Conclusion
In this WebQuest, you explored how ocean tides work and why they are important. You learned that tides are caused mainly by the gravitational pull of the Moon and, to a lesser extent, the Sun. Understanding tides helps us better appreciate how natural forces affect the Earth. Reflect on what you learned and think about how tides might affect coastal communities and daily life.