Vocabulary
Decayed plant and animal matter in soil is called
humus
Made of weathered rock, water, air, and humus
soil
Mountains, canyons, reefs, and islands are some of the physical features on earth's surface called
landforms
The moving of bits of weathered material from one place to another is called
erosion
The process of breaking down rock into smaller pieces is called
weathering
topsoil
A huge sheet of ice that stays frozen all year is called a
glacier
Erosion can be caused by water, wind, or
ice
An area of sediment that builds up at the mouth of a river is called a
delta
The solid, unweathered rock under the layers of soil
bedrock
Glaciers can cause hills called
moraines
Deposited sediment makes the mouth of a river
shallower.
Small bits of weathered rock and other material are called
sediment
The layer that is mostly coarse, weathered rocks without humus
subsoil
Two kinds of sudden erosion caused by gravity
landslides and avalanches
dunes.
landslide
This is the loose material at the surface of the earth
soil
What are the 3 sizes of weathered rock found in soil?
sand, silt, and clay
Water erosion can cause canyons and
gorges