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Lesson 3 of 7 · Ecosystems

Lesson30 XP🌿 Wild Jungle

The Role of Decomposers

🧪Lab Brief #3

Ecosystems.

🎯 Your mission

Understand the idea. Then look for it everywhere.

⚡ The twist

Every species solves the same problem differently.

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Mind = Blown

🐙 An octopus has 9 brains and 3 hearts.

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Make a hypothesis first

Before you watch: what do you think it'll do?

What You'll Learn

Decomposers like fungi and bacteria break down dead organisms and return nutrients to the soil. Without decomposers, dead material would pile up and nutrients would be locked away.

Key Words

Tap a word to see its definition.

Steps

Step 1Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2Do

Create a detailed food web for a local ecosystem. Include at least 8 organisms and use arrows to show energy flow from producers to top predators.

Step 3Observe

Look for patterns in your observations.

Step 4Record

Make a graph or chart showing your results.

Check Your Understanding

Question 1

1 of 3

What is the role of a decomposer in an ecosystem?

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Where you see this in real life

This is why plants grow toward windows and why scabs form.

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Stretch Challenge

Try this in real life this week.

Watch a plant or pet for 5 minutes today and write down what you noticed.

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For the dinner table

Tell me something you noticed about your own body today.

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Next Smart Experiment

We'll pick an experiment that matches exactly how you're thinking right now.

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Send it to a parent who's looking for a 10-minute kitchen science win.

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The Role of Decomposers

Understand the idea. Then look for it everywhere.

Full screen — no distractions

🖨️

Checkout complete lesson on Ecosystems for 3rd Grade

Get the full Ecosystems track as a printable PDF — all lessons, worksheets, and answer keys.

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The Role of Decomposers — Ecosystems | 3rd Grade Science | LittleActivity