cueFlash

Glossary of Chapter 7 Earth Science Vocabulary

Start Studying! Add Cards ↓

The chemical and physical processes that break down rock at Earth’s surface.
weathering
The process by which water, ice, wind, or gravity moves fragments of rock and soil.
erosion
The type of weathering in which rock is physically broken into smaller pieces.
mechanical weathering
The grinding away of rock by other rock particles carried in water, ice and wind.
abrasion
Process that splits rock when water seeps into cracks, then freezes and expands.
ice wedging
The process that breaks down rock through chemical changes.
chemical weathering
Characteristic of materials such as sand and gravel that allow water to pass easily through them.
permeable
The loose, weathered material on Earth’s surface in which plants can grow.
soil
The solid layer of rock beneath the soil.
bedrock
Dark-colored organic material in soil.
humus
Rich, fertile soil that is made up of about equal parts of clay, sand and silt.
loam
A layer of soil that differs in color and texture from the layers above or below it.
soil horizon
Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.
topsoil
The layer of soil beneath the topsoil that contains mostly clay and other minerals.
subsoil
The loose layer of dead plant leaves and stems on the surface of the soil.
litter
An organism that breaks down wastes and dead organisms.
decomposers

Add Cards

You must Login or Register to add cards