Nitrification and denitrification
In this activity, students explore chemical processes that occur within the nitrogen cycle. In a simple experiment, students use a jar of sand to follow the transformation of ammonium to nitrate and its reduction to nitrogen gases.
Nitrification and denitrification
The nitrogen cycle is a complex series of chemical and biological reactions. This simple activity highlights two of the processes in the cycle – nitrification and denitrification – and allows students to visualise processes that usually take place underground.
By the end of this activity, students should be able to:
give a simple explanation of the nitrogen cycle
talk about nitrification
talk about denitrification
use a nitrate test kit and some simple materials to demonstrate the processes of nitrification and denitrification
demonstrate the effects of temperature on microbial activity (extension idea)
demonstrate the energy needs of microbes (extension idea).
Download the Word file for:
introduction/background notes
what you need
what to do
extension ideas
student handout.
Activity idea
This activity requires students to use a nitrate test kit that measures nitrate in parts per million (ppm). If you’d like your students to explore this concept further, this student activity about toxins, Exploring small doses, helps students to understand what parts per million really means.
