cart Shopping Cart cart(0)

Make your own biosphere

You will need:

  • A clean, transparent 2L PET bottle
  • Scissors
  • Stickytape
  • Soil
  • Pebbles
  • Charcoal fragments
  • Small plants


1. Cut the top off the PET bottle using scissors or a sharp knife.

2. Add a layer (about 1 cm deep) of charcoal, followed by a layer of pebbles (about 2 cm deep) and a layer of soil (about 5 cm deep).

3. Stick some holes in the soil and add some small plants. You could also add a layer of moss. Tape the top of the bottle back on.
4. Place your mini biosphere in direct sunlight and water occasionally but not too often - the water in the container should evaporate and condense on the sides of the container, creating its own water cycle.
Be Amazing Book Front Cover; Ben Newsome, teacher & founder of Fizzics Education. Be Amazing -how to teach science the way primary kids love
Be Amazing!
How to teach science, the way primary kids love

Read more about Be Amazing

The biosphere is a closed ecosystem... just need to add sunlight and some water. The charcoal acts as a filter, purifying the water as it cycles through the system. You can also create an aquarium in a PET bottle, with water plants, rocks and some water from your local creek.

Want more ideas for teaching science?

Subscribe to the FizzicsEd Podcast!

Listen to FizzicsEd on Apple Podcasts

FizzicsEd podcast available on Stitcher

Join our newsletter for more science teaching thoughts & ideas

Join the Fizzics newsletter

>100 Free Science Experiments on this site!

Coloured shadows
  • Experiments to colour your class!
  • Easy & fun
read more
skeleton and student
  • Make fake blood & more!
  • Biology made simple
read more
electricity experiments
  • Circuit science for kids
  • Cheap materials found easily
read more
Vortex rings made with fog
  • Experiments using Newton's Laws
  • Step by step science
read more

School Science Visits: 

  • Highly engaging & curriculum-linked
  • Additional Teacher Support Resources
  • Professional visits in-class or via video conference
  • Both Primary School & High School science incursions
Call 1300 856 828 or use this form to discuss or make a show booking for your school!

Love Science?

Signup to our fortnightly email! Learn more

Contact us

1300 856 828

Unit 10/55 Fourth Ave
Blacktown, NSW 2148, Australia
facebook-icon Apple Podcast Icon  twitter-icon
linkedin-icon youtube-icon   pinterest-icon