Unit 7/8 Flashcards
Name the 3 main surface processes
Weathering, Erosion, and Deposition
The BREAKING DOWN of rock
Weathering
The MOVEMENT of sediment from broken rock
Erosion
The DROPPING of sediment in a NEW place
Deposition
Weathering Agents:
Water, ice, wind, animals, growing plants
Erosion Agents:
Water, ice, wind, gravity
Deposition agents:
Formation of an island, sand dunes
Changing pressure, weather, moving water, air, and ice, organisms etc.
Mechanical weathering
Oxidation, dissolution
Chemical weathering
Chemical or mechanical? Copper reacting with oxygen and turning green
Chemical
Folds are caused by…
Compression
Faults with up/down motion are caused by…
Tension
Faults with slip-strike motion are caused by…
Shear
If a mountain range has a lot of soil and plants, the mountain range is likely (old/young)
Old
What causes rocks to break off, slide, and tumble downhill?
Gravity
Waves smashing pebbles against each other; rain erosion is an example of what agent of change?
Water
What blows against rock and other grains of sand
Wind
What pushes into cracks causing rocks to dissolve?
Plant roots
Weathering that occurs through physical means
Mechanical
Oxygen reacts with other substances creating rust
Oxidation
True or false: Rough rock weathers slower than smooth rock
False
Talus, scree, landslide, creep, slump, earthflow, mudflow, and lahar are all…
- differ based on speed and amount of material
- have similar materials
- all terms discuss downhill motion
Oceans (stagnant water) create:
Large flat layers
Slow-moving water @ an angle (downward slope/uneven pressure) creates…
Tilted layers
Running water (rivers) create
Cross-bedding
Which horizon? Topsoil of organic matter, living organisms + rock particles
A
Which horizon? Subsoil of larger rock particles and materials from the A horizon moving downward
B
Which horizon? Regolith of weathered rock
C
Which horizon? Solid rock
D (Bedrock)
True or false: Topsoil is thicker in temperate areas than in tropical and desert areas.
True - it is more temperate. Rain washes away too much and tropical and not enough in desert
Topography that affects the type of drainage basin in the area>
Elevation (water flows downhill)
Nearby water basins in other systems
How are meanders formed?
- water flows on path of least resistance
- an obstruction causes disturbances (meanders) which will enlarge