Biotic Weathering
Biotic Weathering
What is the breakdown of rocks caused by living organisms such as plants, animals, and microorganisms?
Mass wasting.
What is the movement of weathered material or debris down a slope under the influence of gravity?
Main mineral found in limestone.
What is calcium carbonate?
THREE agents of biotic weathering.
What are plants, burrowing animals, and microorganisms?
THREE types/forms of mass wasting.
What are soil creep, mudflow, landslides, rockfall?
THREE characteristics of limestone rocks.
What are sedimentary rock, composed of calcium carbonate, permeable, easily weathered by weak acids, light in colour, may contain fossils?
Process of root wedging.
What is plant roots growing into cracks in rocks?
ONE natural factor and ONE human activity that can trigger mass wasting.
What are natural factor: volcanic activity, earthquakes, or excessive rainfall. Human activity: strip mining, building construction, excavation, or deforestation?
THREE uses of limestone
What are construction, cement manufacturing , and agriculture?
The difference between mechanical and chemical biotic weathering.
What is Mechanical: rocks break into smaller pieces with no chemical change and Chemical: rock composition changes through reactions?
TWO factors that influence the degree of mass wasting.
What are angle of the slope, nature of the rocks, structure of the rocks, human activities?
Define Karst.
What is a type of landscape formed in areas of limestone?
TWO factors that influence the rate of biotic weathering.
What are Climate, Vegetation Cover; Soil Moisture; Type of Rock?
TWO methods used to mitigate mass wasting on Tortola
What are retaining walls, slope reforestation/planting vegetation, contour farming and terracing, gabion baskets, drainage trenches to prevent soil saturation?
Name TWO features of a karst landscape
What are sinkholes; limestone pavements; dry valleys; caves/caverns; stalactites/stalagmites; underground drainage?