Decomposition (Edexcel GCSE Biology): Flashcards

Breaking down organic material into simpler forms of matter

Chemical reactions occur faster, speeding up decomposition

Enzymes denature, slowing or stopping the process

Water essential for respiration & softens organic material

Most decomposers need oxygen for aerobic respiration

Decomposing organic material to produce compost

Natural fertiliser rich in nutrients for soil health

$\frac{\text{mass lost}}{\text{no. of days}}$

20°C to 40°C

Slows bacterial growth and enzyme activity

Removes water, limiting microbial activity

Methane gas

Around 30°C

Cannot be stored as liquid, must be used immediately

Lower water activity, making it difficult for microbes