jjk166
2 hours agoThat's not how space or terrariums work. A terrarium does not spontaneously produce energy out of nothing, it gets energy from the sun. Heat input from the sun is proportional to cross sectional area, while heat loss to space is proportional to surface area, which scale the same for a sphere. A larger object will have more thermal mass which would make it take longer to change its temperature, but it will still have the same thermal equilibrium. Terrariums do not need to be spheres, so the volume does not necessarily scale as the radius cubed.
hparadiz
3 hours agoI imagine one like that in my kitchen which is currently moss, a succulent, and some weed that happened to germenate. All three are alive after two years so far. The bottom is rocks and soil. There's a clear water cycle too as water evaporates and collects on the surface of the glass and then drips down.
tbrownaw
5 hours agoWhat does volume have to do with energy balance?
thfuran
4 hours agoHeat is transferred through the surface area and produced by the volume (assuming there's something going on in the system that's exothermic).
askvictor
4 hours agoIs there a 'just right' size that neither freezes nor fries?
nine_k
5 hours agoAlso it would need many more plants than animals. I would rather go with an aquarium.