Ocean Sharks: Size, Habitat, Food Webs, and Evidence
Suggested grade range: 3–5 Subjects: Science, Math, Writing Time: 2–3 sessions
Learning Objectives
- Describe sharks as animals adapted to life in marine environments.
- Compare measurable characteristics using tables and graphs.
- Construct a simple marine food web and explain feeding relationships.
- Use evidence from reliable sources to communicate what was learned.
Materials
Teacher-selected shark photographs or videos; reference books or reputable science websites; rulers or measuring tapes; graph paper; food-web cards.
Procedure
- Observe: Show several shark species. Students record visible features and questions rather than relying on stereotypes about sharks.
- Compare data: Provide a teacher-verified table of shark lengths or other measurable characteristics. Students create a bar graph and answer comparison questions.
- Habitat research: Students research one shark species and record its habitat, diet, typical size, and one distinctive adaptation.
- Food web: Build a simple marine food web with arrows showing energy flow. Discuss why a food web can contain many connected feeding relationships rather than one straight chain.
- Writing: Students write a short factual paragraph supported by two research notes. A creative story may be added afterward, but it should be clearly labeled as fiction.
- Review: Students identify one fact they learned and one claim that would require evidence before accepting it.
Assessment
Check the graph for accurate labels and comparisons, the food web for scientifically reasonable relationships, and the written paragraph for factual support.
Safety and media note
Use age-appropriate, non-graphic media. Avoid sensational shark-attack footage when it does not contribute to the learning objective.