1.10-1.20 Flashcards
Sand is between ….
0.05-2 mm
what is between 0.05 and 0.002 mm
silt
Clay is anything smaller than
0.002mm
If something is bigger than 2mm, then its
coarse fragments
rank the mineral constituents of soil by size
sand largest, silt medium and clay smallest
what are the 3 mineral constituents of soil
sand silt clay
Soil texture definition
the proportion of particles in the different size ranges(amount of sand silt clay)
soil structure definition
the arrangement of sand silt and clay
soil pores are
the voids between soil particles
what are voids filled with
air and water
whatis Soil water and where is it
resies in pore of the soil and containes nutrients
Soil water infleunces
air concentration and nutrient supply
Organic mater
is the arrangement of mineral particles into clusters
how do roots take in nutrients
root interception, mass flow, diffusion
weathering
any change that reduces size of rocks, rearrange mineral, add organic matter, change composition, create horizons
3 rocks
igneous, sedimentary, metamorphic
igneus is formed by
cooled molten lava
sedimentry
formed when mineral or organic particles accumulate on the Earth’s surface and are cemented together
metamorphic
from any parent rock
secondary minerals
weathered primary minerals
how do primary minerals form
rimary minerals Form during the cooling and solidification of the earth’s crust’s original molten material.
what 3 ways do roots uptake nutrients
root interception, mass flow, diffusion
weathering definition
all physical and chemical changes that reduce size of rocks, rearrange mineral particles, add organic matter, change chemical composition of minerals and create horizons
Weathering is a ___________ and __________ process
destructive and creative
