What could cause inaccurate results when testing for pH ​

Evaporation: this is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). water vapour droplets join together to make clouds! condensation: this is when water vapour in the air cools down and turns back into liquid water.

You need to divided twenty four by a dozen them by the temperature it is getting cook by

And a) oxygen i believe