Spring Clock: The Science of Cherry Blossoms
Ages 3–9
Key Insight
Cherry blossoms bloom based on the 'Dormancy Break' model, requiring a specific amount of winter cold and spring heat.
📖 Explanation
🧒 For Ages 3-5 (Simple Words)
The pink flowers wait for the sun to give them a warm hug before they open. They have a tiny clock inside that says, 'It's Spring!'
🎒 For Ages 6-9 (Science Talk)
Accumulated Temperature
Trees count 'Chilling Hours' in winter. Once they reach a certain number, they wake up from dormancy. Then they count 'Growing Degree Days' (warmth) until they bloom. In Japan, the 'Sakura Zensen' (Cherry Blossom Front) map predicts this using weather data.
❓ Frequently Asked Questions
- Can they bloom twice?
- Rarely! If a massive storm knocks off the leaves in autumn, the tree might get 'confused' and bloom early.
🧪 Flower Bud Micro-View
~20 minSee the baby flowers hiding inside.
🛒 Supplies
📋 Steps
- 1
🌳 Find a Bud
Collect a flower bud from a fruit tree in early spring.
- 2
🔬 Zoom In
Use a pocket microscope to see the tiny petals waiting to grow inside the protective shell.
Watch the Video
Time-lapse of cherry blossoms blooming and the cultural significance.
Spring Clock: The Science of Cherry Blossoms
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