Quick Build a Terrarium Ecosystem Challenge
⚠️ Safety Warning
Wash hands after handling soil and charcoal. Be careful with glass jars.
All experiments require adult supervision.
Materials You'll Need
Gather these 7 items before starting
💡 Tip: Check off items as you gather them to stay organized!
Step-by-Step Instructions
Follow these 8 steps carefully
clean the glass jar thoroughly and let it dry.
Add a 2cm layer of small rocks at the bottom for drainage.
Add a thin layer of activated charcoal on top of the rocks — this filters the air.
Add 5-7cm of potting soil on top of the charcoal layer.
Use a spoon to dig small holes and plant your small plants and moss.
Mist everything with the spray bottle until the soil is damp but not soggy.
Add decorative stones or small figurines if desired.
Seal the lid and place in indirect sunlight. Your mini ecosystem is alive!
✅ Remember: Take your time with each step and ask an adult for help if needed!
The Science Behind It 🔬
A terrarium is a miniature ecosystem that demonstrates the water cycle! Plants absorb water from the soil through their roots and release it through their leaves (transpiration). This water vapor condenses on the glass walls and lid, then drips back down into the soil — just like rain! The plants also photosynthesize, taking in carbon dioxide and releasing oxygen during the day. The charcoal filters out toxins and prevents mold. A well-balanced terrarium can sustain itself for years without opening, proving how elegantly nature recycles resources! Try changing one variable at a time to see how it affects the results — this is called the scientific method!