Rocks of similar sizes can have different masses. Soil is made of particles of stone, and dead plant and animal materials. Properties of rocks and soils impact how people use them. Erosion is the breaking apart and moving of rocks and soil. People can prepare for and help prevent erosion.
Plants have similarities and differences.
Plants change as they grow. Plants have many needs including sunlight, water, soil and air. Most plants have stems, roots, flowers, leaves, and buds. Plants live in different habitats. Plants have adaptations to habitats.