Rocks and Soil Flashcards

Grade 2 · Science · Flashcards

Review important words about rocks, minerals, and soil.

Flashcards

rock: A hard, solid natural material made of one or more minerals
mineral: A natural solid material found in the earth; rocks are made of minerals
soil: The loose top layer of the earth made of tiny rock pieces and decayed plants and animals
pebble: A small, rounded rock
boulder: A very large rock, bigger than a person
sand: Very tiny pieces of worn-down rock
clay: Soil made of very tiny particles that holds a lot of water and can be shaped when wet
loam: Rich soil that is a mix of sand, clay, and decayed plant matter — great for gardens
erosion: When wind or water carries away rock and soil from one place to another
weathering: The breaking down of rocks into smaller pieces by wind, water, ice, or other forces
nutrients: Helpful materials in soil that plants absorb to grow
humus: Dark, rich material in soil made from decayed plants and animals
texture: How something feels when you touch it — rocks can be smooth, rough, or bumpy