Introduction
Have you ever wondered why the ocean seems to rise and fall every day? Why can the same beach look completely different at different times of the day?
These changes are called ocean tides. Tides are mainly caused by the gravitational attraction of the Moon and the Sun, together with Earth's rotation and the movement of ocean water.
In this WebQuest, you will become a young ocean scientist. Your mission is to investigate what causes tides, identify different types of tides, and discover how tides affect people and coastal communities. You will use reliable online resources to gather evidence and explain your findings.
Task
Your group has been asked to create an “Ocean Tides Investigation Report” for students who want to understand why tides occur.
Your final product should be a digital infographic or 5–7 slide presentation that answers these questions:
- What are ocean tides?
- What causes tides?
- What roles do the Moon and Sun play?
- What are high tide and low tide?
- What are spring tides and neap tides?
-
How do tides affect people, animals, and coastal communities?
Your presentation should include diagrams or images, explanations in your own words, and the sources you used.
Process
Step 1: Become a Tide Investigator
Begin by learning what tides are. Read/watch the resources provided by your teacher.
Write down at least three important facts about tides.
Step 2: Investigate the Moon and Tides
Research how the Moon's gravity affects Earth's oceans.
Answer:
Why does the Moon have such an important effect on ocean tides?
Create a simple diagram showing the relationship between the Earth, Moon, and ocean tides.
Step 3: Investigate the Sun
The Moon is not the only object that affects tides. Investigate how the Sun's gravitational pull contributes to tides.
Answer:
How can the positions of the Sun, Moon, and Earth affect the height of tides?
Step 4: Compare Types of Tides
Research the difference between:
- High tide
- Low tide
- Spring tide
- Neap tide
Complete a comparison table:
| Type of Tide | What happens? | When does it occur? |
|---|---|---|
| High Tide | ||
| Low Tide | ||
| Spring Tide | ||
| Neap Tide |
Step 5: Connect Tides to Real Life
Investigate how tides affect people and the environment.
Consider:
- Fishing
- Coastal communities
- Marine animals
- Transportation
- Tourism
- Renewable energy
Choose two examples and explain how tides affect them.
Step 6: Create Your Final Product
Use the information you gathered to create your Ocean Tides Investigation Report.
Your presentation/infographic should contain:
Title → Explanation → Evidence → Diagrams → Real-life applications → Sources
Remember: Do not simply copy information from websites. Explain what you learned using your own words.
Evaluation
100 Points
| Criteria | Excellent | Good | Developing | Points |
|---|---|---|---|---|
| Scientific Accuracy | Information is accurate and clearly explained | Mostly accurate | Several inaccuracies | 30 |
| Research & Evidence | Uses several credible sources and relevant evidence | Uses appropriate sources | Limited sources/evidence | 20 |
| Understanding of Tides | Clearly explains causes and types of tides | Explains most concepts | Shows limited understanding | 20 |
| Final Product | Well-organized, creative, and visually clear | Organized and understandable | Some organization problems | 15 |
| Real-Life Application | Clearly connects tides to people/environment | Provides relevant examples | Connections are limited | 10 |
| Sources & Citations | Sources are clearly identified | Most sources identified | Few sources identified | 5 |
| TOTAL | 100 |
Conclusion
Congratulations, Ocean Scientists!
Through this WebQuest, you investigated one of Earth's most fascinating natural phenomena. You learned that ocean tides are primarily influenced by the gravitational forces of the Moon and Sun and that the positions of these bodies can produce different tidal patterns.
More importantly, you discovered that tides are not simply the rising and falling of seawater. They affect marine ecosystems, fishing, transportation, coastal communities, and human activities. Reflect on your investigation and answer:
What is one thing you learned about ocean tides that you did not know before, and how might this knowledge help you understand life in coastal areas?