* Scientific: "The bacteria in the soil utilize organic matter as a substrate for their growth."
* Biological: "Enzymes are biological catalysts that speed up reactions by interacting with specific substrates."
* Chemical: "The reaction required a solid substrate to facilitate the chemical process."
* Gardening: "The rich, loamy substrate provided the perfect environment for the seedlings to thrive."
* Art: "The artist used a textured substrate to create depth and dimension in the painting."