Ecosystem Interactions

Grade Level: 5th Grade

Subject: Science

Duration: 45 minutes

Class Size: 20 Students

Curriculum Alignment

• TEKS 5.12A: Observe and describe how a variety of organisms survive by interacting with biotic and abiotic factors in a healthy ecosystem.
• TEKS 5.3A: Develop explanations and propose solutions supported by data and models.

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Lesson Objective

By the end of this lesson, students will:

• Recognize the difference between biotic (living) and abiotic (non-living) factors in an ecosystem.
• Explore how organisms depend on one another and their environment to survive.
• Develop models of ecosystems and use data collection to explain interactions.

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Materials Needed

• Large hula hoops (5 total)
• Printed biotic (animals, plants) and abiotic (rocks, water, sunlight) picture cards
• Clipboards and worksheets for data collection
• Magnifying glasses
• Colored pencils and blank paper

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Engagement (5 Minutes) – The Living Web

1. Quick Discussion: Write "biotic" and "abiotic" on the board. Ask students:
   • "What do you think these words mean?" (Listen for responses related to living/non-living things.)
   • "Can you name some examples?"
2. Interactive Demo: Select a student to pretend to be a tree, another to be a rabbit, and another to be the sun. Have them act out how they might interact (e.g., the rabbit eats leaves, the tree needs sunlight).

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Exploration (15 Minutes) – Ecosystem Discovery Stations

Students will rotate in groups of four through five interactive ecosystem stations set up outside or in a large classroom space. Each station features a hula hoop “ecosystem” with biotic and abiotic cards inside.

Station 1: Forest

• Students analyze leaves, tree bark, and images of deer and mushrooms.
• Discussion prompt: "What living and non-living things help the deer survive?"

Station 2: Pond Habitat

• Examine water samples with magnifying glasses (pre-set with food coloring and tiny objects to resemble microscopic organisms).
• Question: "What organisms might depend on the water?"

Station 3: Desert

• Feel rocks, sand samples, and look at pictures of cacti and lizards.
• Challenge: "How do plants survive without much water?"

Station 4: Arctic

• Look at pictures of ice, polar bears, and penguins. Discuss insulation and adaptation.
• Question: "How does the cold impact survival?"

Station 5: The Mystery Ecosystem

• A surprise mix of objects (both biotic and abiotic) for students to categorize.
• Challenge: "What kind of ecosystem could these belong to?"

Each student records observations and predictions in their science journal.

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Explanation (10 Minutes) – Create an Ecosystem Web

1. Group Discussion:

   • Each group shares one surprising biotic-abiotic relationship they observed during station time.
   • Display a class-size food web model (drawn on the board).

2. Ecosystem Web Activity:

   • Using yarn and index cards, students work together to create a "web" of connections between organisms and their environment.
   • Example: A sun connects to grass, which connects to a rabbit, which connects to a fox.

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Elaboration (10 Minutes) – Imagine Your Own Ecosystem

• Students draw and label their own mini-ecosystem using colored pencils.
• Must include at least three biotic and two abiotic factors.
• Partner Share: Students explain how the organisms and conditions interact for survival.

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Evaluation (5 Minutes) – Exit Ticket Challenge

Before leaving, each student writes on a sticky note:
"One way biotic and abiotic factors work together is…"
The notes are added to an “Ecosystem Wall” for review in future lessons.

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Differentiation Strategies

• For Struggling Learners: Provide sentence starters such as "A biotic factor I observed was…".
• For Advanced Students: Challenge them with "What would happen if an abiotic factor was removed?"

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Teacher Reflection & Assessment

• Observe students' engagement at stations.
• Collect and review their science journals and drawings for understanding.
• Use exit tickets to gauge comprehension for future lessons.

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Extension Ideas

• Outdoor Exploration: Take students to a school garden or park to observe real-life biotic/abiotic interactions.
• STEM Connection: Design a “super-survivor” organism adapted to extreme conditions!

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This lesson ensures students learn by doing, making connections, and leading their own learning—an exciting, hands-on approach to ecosystems! 🚀 🌿