4th Grade Soil and Weathering

Match it! Select the correct answer from the pull down...Good luck!

The layer that is mostly coarse, weathered rocks without humus is called---

The three sizes of weathered rock found in soil are ___________, silt, and clay.

Mountains, canyons, reefs, and islands are some of the physical features on the earth's surface called---

________________happens as water or wind gradually wears away rock by friction.

The layer in which most plants grow is called---

_______________happens when water in and around rocks and soil freezes and expands, breaking up the rocks.

Decayed plant and animal material in soil is called ---

A process of breaking down rocks into smaller pieces is called ----