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37 terms

Chapter 3 Lesson 2 - Water Erosion

Earth's Surface
STUDY
PLAY
Runoff
water that flows over the groun surface rather than soaking into the ground
Rill
a tiny groove in soil made by flowing water
Gully
A large channel in soil that carries runoff after a rainstorm
Stream
a channel through which water is continually flowing downhill
Tributary
a stream or river that flows into a larger river
Flood Plain
the flat, wide area of land along a river
Meander
a looplike bend in the course of a river
Oxbow Lake
a meander cut off from a river
Delta
a landform made of sediment that is deposited where a river flows into an ocean or lake
Alluvial Fan
a wide, sloping deposite of sediment formed where a stream leaves a mountain range
Groundwater
water that fills the cracks and spaces in undergourn soil and rock layers
Stalactite
an icicle-like structure that hangs from the ceiling of a cavern
Stalagmite
a columnlike form that grows upward from the floor of a cavarn
Karst Topography
a region in which a layer of limestone close to the surface creates deep valleys, caverns, and sinkholes
How does runoff affect the rate of erosion?
more runoff increases the rate of erosion
Put these in order of size from biggest to smallest: creek, rill, gully, river
River, creek, gully, rill
A river's ___ is the flat, wide area of land along side of it.
flood plain
the term geologists use for underground water is ___.
groundwater
When runoff travels downhill, it forms tiny grooves in soil called___.
rills
A ___ is a deposit that hangs from the roof of a cave.
stalatite
A type of landscape in rainy regions where caverns, sinkholes, and deep valleys are common is called ____.
Karst landscape
A ___ is a large groove, or channel inthe soil that carries runoff after a storm.
gully
A cone-shaped deposit that rises from the floor of a cave is known as a ___.
stalagmite
The water that moves over the land and carries particles with it is called ___.
runoff
A ___ is a channel along which water is continually flowing down a slope.
Stream
Where a stream leaves a mountain range you will find an ___, a wide, sloping deposit of sediment.
alluvial fan
A bend in a river's shaped like a loop is called a ___.
meander
What are five landforms formed by river erosion?
valleys, waterfalls, flood plains, meanders, and oxbow lakes
How does ground water cause erosion?
ground water causes erosion throug a process of chemical weathering
What are two landforms formed by river deposition?
alluvial fans and deltas
Vegetation such as grasses ___ runoff.
increase
An ___ is a meander that has been cut off from the river.
oxbow lake
Ground water can cause erosion through ___ weathering
chemical
A ___ forms when sediment gets laid down where a river flows into an ocean.
delta
Waterfalls and rapids occur where rivers meet and flow over ___ rock.
hard
Deltas and alluvial fans form at the point of river ___.
deposition
What is a channel with continually flowing water that flows into a larger river called?
tributary