Seed Voyagers Lesson Plan Grade 2–3 Science & STEM
Seed Voyagers: Airborne Dispersal
Duration: 70 Minutes
NGSS: 2-LS2-2 • 3-5-ETS1-2
Lesson Phenomenon & Challenge Why do autumn seeds have wings, bristles, and propellers? In this inquiry-led engineering lesson, students examine how tree seeds travel away from parent plants before engineering paper helicopter ("whirlybird") prototypes to test how wing dimensions alter airborne travel time and distance.
Learning Targets
Identify physical adaptations that help seeds disperse by wind (gliders, parachutes, helicopters).Construct a functional paper helicopter model replicating a maple samara seed.Measure & Compare how changing wing length or weight affects spin and flight distance.
NGSS Alignment
2-LS2-2: Develop a simple model that mimics the function of an animal in dispersing seeds or pollinating plants.3-5-ETS1-2: Generate and compare multiple possible solutions to a problem based on how well each meets criteria.
Essential Vocabulary & Key Concepts
Seed Dispersal
The movement of seeds away from parent trees to find sunlight, soil, and water.
Samara (Whirlybird)
A winged dry fruit (like maple) designed to auto-rotate as it falls, slowing descent.
Air Resistance & Lift
Friction pushing up against falling surfaces, slowing gravity and creating rotational spin.
Required Materials Checklist
Per Student / Pair:
1 Whirlybird Engineer Guide & Template
1 Flight Test Student Worksheet
1 Pair of safety scissors
2–3 Standard paperclips (weight variables)
1 Ruler (12 in / 30 cm)
Classroom & Teacher Prep:
Specimen seeds (real maple keys, ash, dandelions if in season, or photo cards)
1 Electric fan (for horizontal wind simulation)
Floor tape / measuring tape for drop runway
1 Stopwatch or visual classroom timer
Seed Voyagers • Grade 2–3 Integrated STEM Page 1 of 2
Instructional Sequence & Delivery
Phase-by-Phase Facilitation
10 MIN Engage
Autumn Mystery: Why Don't Seeds Just Drop?
Show real maple samaras or dandelion tufts. Ask: "If a giant oak or maple drops 5,000 seeds right next to its trunk, will they all grow into big trees?" Guide students to realize that seedlings need sunlight, water, and space. Introduce the concept of Seed Dispersal by Wind .
15 MIN Explore
Slide Visuals & Seed Structure Analysis
Project the slide deck. Compare two main wind-travel structures: Parachutes (dandelion floss) and Gliders/Copters (maple samara). Have students observe how the asymmetrical wing creates lift and a helicopter-like spiral as gravity pulls the heavy seed pod downward.
20 MIN Engineer
Build the Whirlybird & Plan Variations
Distribute the Whirlybird Engineer Guide . Model cutting along solid lines and folding along dashed lines. Emphasize that Blade A folds forward and Blade B folds backward. Demonstrate standard drop test. Then task teams with testing 1 variable : wing width, wing length, or paperclip count.
15 MIN Experiment
Wind Corridor Testing & Data Logging
Set up 2 drop zones. Students drop their standard prototype vs. modified prototype from 5 feet (or standing height). In Zone B, turn on a low-speed box fan to test horizontal travel distance. Students record trials on the Flight Test Worksheet .
10 MIN Debrief
Scientific Claim & Reflection
Synthesize findings on the board. Which design stayed in the air longest? Which carried farthest in the breeze? Discuss how longer hang-time gives autumn wind gusts more opportunity to blow seeds far from parent shade.
Support & Scaffolding
Pre-cut templates for students developing fine-motor scissor control.
Use visual color-coded stickers to indicate "Fold Forward" and "Fold Back".
Pair budding readers with peer partners for reading test metrics.
Extension & Challenge
Challenge students to build a 3-bladed helicopter or asymmetrical maple wing.
Test different paper weights (construction paper vs. tracing paper).
Calculate average flight times using simple two-digit addition.
Pro Tip: Ensure students drop the whirlybird with wings pointing upward, releasing smoothly without throwing downward. Consistent drops guarantee fair testing!
Seed Voyagers • Grade 2–3 Integrated STEM Page 2 of 2
Seed Voyagers Slides Grade 2–3 Science & STEM
Flight Lab
Seed Voyagers
Engineering Airborne Seed Dispersal
Discover how trees send their babies flying on autumn breezes—and engineer your own paper whirlybird to catch the wind!
1. Observe Nature
2. Engineer Models
3. Test Wing Shapes
The Big Forest Question
Why Must Seeds Travel?
Too Much Shade
A giant parent tree blocks out the sunshine. Young seedlings cannot make food in the dark!
Thirsty Roots
Parent tree roots suck up all the water and soil nutrients right under the trunk.
Wind Dispersal
Plants grow winged seeds that catch the breeze and fly far away to find open ground!
Dispersal = Moving seeds away from parent plants to give baby plants room to grow!
Nature's Airborne Adaptations
Wings & Parachutes
1. The Parachute
Dandelions and milkweeds have light, fluffy hairs called pappus that act like tiny umbrellas.
Flight Secret: Floats on warm updrafts!
2. The Helicopter
Maple and ash trees grow winged fruits called samaras that spin in circles as they drop.
Flight Secret: Auto-rotation slows its fall!
Today we are investigating and modeling the spinning Maple Samara !
How Does a Maple Seed Spin?
Forces in Action
Gravity Pulls
The seed pod is the heaviest part. Gravity pulls the heavy end straight toward Earth.
Air Resists
As the seed falls, air pushes upward against the broad paper-thin wing.
Spin Creates Lift
The curved wing tilts, forcing the seed into a rapid spin that acts like an aerial brake!
Result: The seed falls slowly, allowing autumn gusts to carry it far away!
Your STEM Engineering Mission
Paper Whirlybirds
Step 1: Build Standard Model
Cut only along the solid lines .
Fold Blade A forward and Blade B backward.
Add a paperclip to the bottom for seed weight.
Step 2: Choose 1 Variable
Can you engineer a seed that travels farther or stays in the air longer?
Option A: Longer vs. Shorter Wings
Option B: Wider vs. Narrower Wings
Option C: Heavier Seed Weight (1 vs. 3 Paperclips)
Golden Rule of Science: Change only ONE variable at a time!
Whirlybird Engineer Project Guide Whirlybird Engineer Guide
Standard Samara Prototype • Cut, Fold & Launch
Engineer(s):
Date:
Assembly Blueprint (Follow in Order)
1. Cut Solid Cut along all solid outer black lines and down the center solid slit between Wing A & Wing B.
2. Fold Wings Fold Wing A forward along dashed line. Fold Wing B backward along dashed line.
3. Fold Stem Fold Side Tab C inward. Fold Side Tab D inward over Tab C to create a sturdy stem.
4. Add Seed Fold bottom Tab E up 1/2 inch. Slide 1 paperclip over Tab E to represent the seed weight.
Cut-Out Template #1: Standard Baseline Model
BLADE A
Fold Forward
Wing Surface
BLADE B
Fold Backward
Wing Surface
--- FOLD LINE (DASHED) ---
TAB C Fold In
STEM BODY Center Backbone
TAB D Fold In
--- FOLD LINE (DASHED) ---
TAB E • SEED POD
Fold up 1/2 in & attach standard paperclip here
Pre-flight check: When held by the stem, Wing A and Wing B should stick out like a flat "Y" shape. Drop gently from eye level to test!
Whirlybird Engineer Guide • Standard Template Page 1 of 2
Design Modification Challenge
Test 1 Variable to Increase Hang Time or Travel Distance
Iterate & Adapt
The Natural Selection Challenge In the wild, maple trees whose seeds fly the farthest pass their genes to the next generation. Your engineering team must design a modified whirlybird prototype. Choose ONE variable below to modify.
Variable 1
Wing Length
Cut the wings shorter by 2 cm, or extend the wings longer using extra paper strips.
Does wing length change spin speed?
Variable 2
Wing Width
Trim the wings narrower by half, or fold wider flaps to catch more wind resistance.
Does wider wing surface give more lift?
Variable 3
Seed Weight
Add 2 or 3 paperclips to the seed pod tab to simulate a heavier, plump seed.
Does heavier weight pull it down too fast?
Engineering Team Blueprint & Prediction
1. Which single variable is your team testing?
Wing Length
Wing Width
Seed Weight
2. Our Hypothesis (Prediction):
Flight Test Worksheet STEM Flight Log • Field Science
Seed Voyagers: Flight Test Sheet
Scientist:
Date: Team:
1
Observe Real Seeds: Form & Function
Sketch a Real Maple Seed (Samara):
Seed Adaptation Check:
Wing (Blade): Thin, flat, catches the air
Seed Pod: Heavy base pulls downward
Curved Edge: Helps create spiral spin
2
Fair Test Drop Protocol
Drop from shoulder height (5 ft)
Wings pointing UP
Smooth release (No pushing!)
3
Baseline Trials: Standard Whirlybird (1 Paperclip)
Trial # Hang Time (Seconds) Spin Quality (Circle One) Flight Notes Trial 1 Fast Spin Slow Spin Tumbled
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| Trial 2 |
| Fast Spin Slow Spin Tumbled |
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| Trial 3 |
| Fast Spin Slow Spin Tumbled |
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Baseline Average Hang Time: ~ seconds
Seed Voyagers • Grade 2–3 Flight Test Sheet Page 1 of 2
Wind Runway Challenge
Standard Model vs. Modified Engineering Model
Our Team Changed (Variable): [ ] Wing Length [ ] Wing Width [ ] Weight
4
Dispersal Data in the Breeze (Fan / Wind Zone)
Model Tested Trial 1 Distance Trial 2 Distance Trial 3 Distance Longest Flight! Standard Model Regular wings, 1 clip
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| Modified Model Our custom adaptation |
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5
Visual Results: Color the Bar Chart
Color upward to show how far each seed traveled
Far (6+ ft) Medium (3-5 ft) Short (0-2 ft)
Standard
Modified
6
Scientific Claim & Reflection
A. Claim: Which model traveled farther in the wind?
Our evidence showed that the ______________________ model flew farther because...
