Erosion and Deposition6th Grade Science
I. Changing Surface
A. Movement1. Sediment = Material moved by erosion
2. Deposition = Build-up of sediment
B. Gravity (Mass)1. Landslides
2. Mudflow
3. Slump
4. Creep
II. Water
A. Runoff Amounts1. Rain amount
2. Vegetation
3. Soil Type
4. Shape of land
5. Human use
B. Types
1. Rills – Tiny grooves
2. Gully – Large groove
3. Stream – Gullies combine
4. River – Streams combine
5. Tributaries – Into major river
C. Erosion
1. Waterfall
2. Flood Plains
3. Meanders – Curved flow in flat plain
4. Oxbow lake – Cut off from river
D. Deposit
1. Alluvial Fan
2. Delta
3. Flood Plain
E. Ground
1. Caves
i. Stalactite
ii. Stalagmite
2. Karst
III. Moving Water
A. Erosion
1. Abrasion – Wearing away rock with sediment
2. Load – Amount of sediment in river
B. Load
1. Slope – Faster means more load
2. Volume – More water means more load
3. Shape – Deep stream is faster
i. Turbulence – Multidirectional movement
C. Factors
1. Slower side leaves deposits
2. Faster side causes erosion
IV. Glaciers
A. Types
1. Continental
i. 10% of Land
2. Valley Glaciers
i. High mountain snow fall
ii. Motion cm to meters per day.
B. Shaping Land
1. Plucking
2. V-shape river to U shape valley
3. Deposits
i. Till
ii. Moraine – Edge of glacier
iii. Kettle – Depression in surface
V. Waves
A. Erosion
1. Hitting shoreline
2. Abrasion
3. Worst at headlands
B. Deposition
1. Beach – Wave washed sediment
2. Longshore drift – Movement with current
3. Spit – Fingerlike projection of sand
4. Sandbars – Broken up spits
VI. Wind
A. Erosion1. Deflation
2. Abrasion
B. Deposition
1. Sand Dunes
2. Loess Deposits
QUIZ