Soil-Net - Weathering and soil formationWeathering is the name given to the process by which rocks are broken down to form soils. . Respiration of carbon dioxide by plant roots can lead to the formation of . These weathering processes have given rise to most of the world's soils. . Most of the tiny particles making up our soils will have started as solid rock.what do these small plants need that is provided for by the rock,Lesson 9: What do Plants need? Summary Objectives Materials .plants need to survive (soil, light, nutrients, water, air) and propose ways to . Decide if you want to actually do these experiments, or just work on the students' ability to . also plant lettuce or other vegetable seeds in small break-apart trays at least three weeks . nutrients for plant growth), and rock. . and provide stability.
what do these small plants need that is provided for by the rock