Exogenic Processes Flashcards
What are LANDFORMS?
geomorphic features on Earth’s surface
What are some large landforms?
- plains
- plateaus
- mountains
What are some minor landforms?
- hills
- valleys
What are EXOGENIC PROCESSES?
how landforms change on the Earth’s surface
What often assists exogenic processes?
geomorphic agents
What are examples of GEOMORPHIC AGENTS?
- flowing water
- wind
- moving ice
- waves
What are the different types of exogenic processes?
- erosion
- transportation
- deposition
- mass-wasting
- weathering
What is EROSION?
gradual destruction of materials and transportation elsewhere
What is TRANSPORTATION?
movement from a high-energy location to a low-energy location
What is DEPOSITION?
settling of sediments, soil, and rocks on a landmass
What is MASS WASTING?
gravity-induced downslope of rock material
What is the sole, principal force of mass-wasting?
gravity
What is WEATHERING?
the breakdown of rocks on Earth’s surface
What are the types of weathering?
- physical
- chemical
What are the PHYSICAL types of weathering?
- unloading
- thermal expansion and contraction
- freeze-thaw weathering
- salt crystal growth
- hydration
What are the CHEMICAL types of weathering?
- oxidation
- solution and carbonation
- hydrolysis
What is UNLOADING?
underground rocks expand when they reach the surface, cracking in a sheeting structure
What is FREEZE-THAW weathering?
- water in the crack of a rock freezes
- expands 9%
- breaks the rock apart
What is SALT CRYSTAL GROWTH?
- water with dissolved salt accumulates
- evaporates
- salt crystals split rock apart
What is HYDRATION?
water molecules attach to a mineral’s crystalline structure and make it expand
What is freeze-thaw also called?
frost/ice wedging
What happens when minerals are hydrated and dehydrated?
- expand
- shrink
What is OXIDATION?
O2 + substance = new product
What is SOLUTION AND CARBONATION?
CO2 + H2O = decomposition
What is HYDROLYSIS?
water + rocks = new compound
What are fast materials?
- rock
- snow
- ice
- earth
- debris
- mud
What’s a slow material?
soil
What is SOIL?
thin and consolidated
What is EARTH?
thicker soil