Science Test Flashcards
what are some times of weathering?
mechanical and chemical
what are some types of Mechanical weathering?
Frost Action/ Ice Wedging, Biotic Activity/Root Wedging, Thermal Expansion, Abrasion.
What are some types of chemical weathering?
Carbonation Oxidation/ Hydrolysis, Biological Breakdown.
What is soil made out of?
a mixture of rocks, air, water, and organic matter.
Types of Textures (largest to smallest):
1.
2.
3.
1.SAND
2.SILT
3.CLAY
Horizon O:
Horizon A:
Horizon B:
Horizon C:
Horizon R:
O: Humus
A: Topsoil
B: Subsoil
C: Parent Material
R: Bedrock
What is crop rotation?
Crop rotation is the practice of growing a series of different types of crops in the same area across a sequence of growing seasons.
What is terracing?
A terrace in agriculture is a flat surface that has been cut into hills or mountains to provide areas for the cultivation for crops, as a method of more effective farming.
What is contour plowing?
Contour plowing or contour farming is the farming practice of plowing and/or planting across a slope following its elevation contour lines.
What is cover crop?
In agriculture, cover crops are plants that are planted to cover the soil rather than for the purpose of being harvested.
What is no-till farming?
No-till farming is an agricultural technique for growing crops or pasture without disturbing the soil through tillage.(not causing erosion)
What are some agents of Mechanical weathering? (Pick 7)
temperature change
gravity
ice
exfoliation
living things
wind
water
What are some agents of Chemical weathering?
acid & precipitation
acid & ground water (underground water)
acid living things
oxidation (rusting)
