Understanding Ocean Tides and Coastal Safety

Introduction

Have you ever noticed that the sea does not stay at the same level throughout the day? Sometimes the water is high and reaches farther inland, while at other times it becomes low and exposes more of the shore. This rise and fall of seawater is called ocean tide.

In coastal communities, understanding tides is very important. Fisherfolk, travelers, coastal residents, and local disaster risk reduction offices consider tide conditions when planning daily activities and preparing for possible coastal hazards. In this WebQuest, you will investigate why tides happen, how the Moon and Sun affect them, and why knowing about tides can help people stay safe.

Task

Your task is to work in a small group and create an Ocean Tides and Coastal Safety Information Poster.

Your poster must explain:

  1. What ocean tides are.
  2. The difference between high tide and low tide.
  3. How the Moon and Sun affect tides.
  4. The difference between spring tide and neap tide.
  5. Why tide information is important for coastal communities.
  6. At least three safety tips for people living near coastal areas.

At the end of the activity, each group will present its poster to the class for three to five minutes.

Process

Step 1: Form Your Group

Form a group of three to five members. Assign the following roles:

  • Researcher – looks for information from the provided resources.
  • Illustrator/Designer – prepares diagrams and visual layout.
  • Writer – writes the explanations in simple words.
  • Presenter – leads the group presentation.
  • Checker – checks if the poster is complete and accurate.

Step 2: Learn the Basic Concept of Tides

Use the provided online resources to answer these guide questions:

  • What are ocean tides?
  • What causes tides?
  • What is the role of the Moon?
  • What is the role of the Sun?
  • What is the difference between high tide and low tide?

Write your answers in your notebook.

Step 3: Compare Types of Tides

Study the difference between:

  • High tide and low tide
  • Spring tide and neap tide

Create a simple diagram showing the position of the Earth, Moon, and Sun during spring tide and neap tide.

Step 4: Connect Tides to Real Life

Discuss these questions with your group:

  • Why should fisherfolk know the tide schedule?
  • Why should coastal residents understand high tide?
  • How can tide information help during storms or flooding?
  • What can students do to help their family understand tide safety?

Step 5: Create Your Poster

Using cartolina, bond paper, or a digital tool such as Canva, Google Slides, or PowerPoint, create your Ocean Tides and Coastal Safety Information Poster.

Your poster must include:

  • Title
  • Definition of ocean tides
  • Diagram of high tide and low tide
  • Diagram of spring tide and neap tide
  • Explanation of how the Moon and Sun affect tides
  • Importance of tides to coastal communities
  • Three safety tips
  • Names of group members

Step 6: Present Your Output

Each group will present its poster to the class. During the presentation, explain the main ideas clearly and show how your poster can help people understand tides and coastal safety.

Evaluation

Your work will be graded using the following rubric:

Criteria Excellent - 4 Good - 3 Fair - 2 Needs Improvement - 1
Content Accuracy Information about tides is complete, correct, and clearly explained. Information is mostly correct with minor missing details. Some information is correct, but important details are missing. Information is inaccurate or very incomplete.
Use of Resources Uses several provided resources and shows clear understanding. Uses some provided resources properly. Uses limited resources with weak connection to the task. Resources are not used properly.
Visual Presentation Poster is creative, organized, neat, and easy to understand. Poster is clear and organized. Poster is somewhat organized but lacks visual appeal. Poster is messy or difficult to understand.
Real-Life Connection Clearly explains the importance of tides to coastal communities and safety. Gives a good explanation of the real-life importance of tides. Gives limited real-life connection. Does not explain why tides are important in real life.
Group Collaboration All members participated actively and performed their roles well. Most members participated. Only some members participated. Group work was not evident.
Oral Presentation Presentation is clear, confident, and well-organized. Presentation is understandable and organized. Presentation is somewhat unclear or incomplete. Presentation is unclear and lacks preparation.

Total Score: 24 points

Conclusion

Through this WebQuest, you learned that ocean tides are caused mainly by the gravitational pull of the Moon and the Sun. You also learned the difference between high tide and low tide, as well as spring tide and neap tide.

More importantly, you discovered that learning about tides is not only a science lesson. It is also useful in real life, especially for people living in coastal communities. Understanding tides can help people plan fishing activities, travel safely, avoid danger, and prepare for coastal hazards.