Pre Test Direction: Choose your answer from the given words by writing on the blank. Aerobic Anaerobic Decomposition Substrate Humidity 1. The degree of wetness or moisture of soil. 2. The process of decomposition in which there is absence of air. 3. The process of breaking up into parts or into simpler elements. 4. The process of decomposition with air involved. 5. Refers to the raw materials to be used for composting.