Soil bacteria that break down large chemicals are called decomposers.

Here's why:

* Decomposers are organisms, primarily bacteria and fungi, that break down dead organic matter (like plants, animals, and their waste) into simpler substances.

* This process is called decomposition.

* Large chemicals can include complex organic molecules like proteins, carbohydrates, and fats.

* Decomposers release nutrients back into the soil, making them available for other plants to use.

Let me know if you'd like to know more about decomposers or the decomposition process!