develop different social levels, classes, or castes; "Society stratifies when the income gap widens
render fertile and preserve by placing between layers of earth or sand; "stratify seeds"
render fertile and preserve by placing between layers of earth or sand; "stratify seeds" form layers or strata; "The rock stratifies" form, arrange, or deposit in layers; "The fish are stratified in barrels"; "The rock was stratified by the force of the water"; "A statistician stratifies the list of names according to the addresses" divide society into social classes or castes; "Income distribution often stratifies a society" develop different social levels, classes, or castes; "Society stratifies when the income gap widens
form, arrange, or deposit in layers; "The fish are stratified in barrels"; "The rock was stratified by the force of the water"; "A statistician stratifies the list of names according to the addresses"
Read the entry on pretreating seeds first Ok So the seed must first undergo a cold period (just above freezing at 35 or so degrees F) before germination can occur Instead of waiting an entire season or year, hasten the process by chilling seeds in the refrigerator To prevent seeds from sticking and to keep them evenly damp, pack them together with vermiculite or sphagnum moss Place in an airtight container or bag Do not remove until the appropriate time period has passed Each variety of seed has its own requirements
Layering of water, of different temperatures/oxygen concentrations that takes place during the summer months The uppermost layer (the epilimnion) consists of warm, well oxygenated water which is circulated through wave action A rapid decrease in water temperature characterizes the middle layer of water (the thermocline) Many fish occupy this layer during daylight hours The lower layer of water (the hypolimnion) consists of cold, oxygen poor water Temperature sensitive fish (lake trout, lake whitefish) retreat to this layer during summer months
The process of preparing a tree seed for sowing by dispersing the seeds in sand and subjecting them to cold conditions, outdoors or artificially in a freezer or - refridgerator This encourages germination
lack of adhesion between different coats It occurs when several coats of the same coating have been applied later than the suggested maximum recoating time, thus affecting adhesion between coats
Stratification is the division of something, especially society, into different classes or layers. She was concerned about the stratification of American society. Layering that occurs in most sedimentary rocks and in igneous rocks that are formed at the Earth's surface, such as from lava flows and volcanic deposits. The layers (strata) may range from thin sheets that cover many square miles to thick lenslike bodies that are only a few feet wide
1 any nonuniform vertical distribution within vegetation, may be continuous (as in gradients in midday humidity from ground to outer canopy) or discontinuous; if the latter, individual strata can be defined As cited in
The process of artificially breaking seed dormancy by placing them in layers of moisture-retaining media, under generally cool and moist conditions, for a period of time, so as to simulate winter conditions Basically, you try to fool the seed into thinking it has endured a long, North Country winter when, in fact, it has just spent a couple of months in your fridge
Layers of deposits that provide archaeologists with one of the major tools or clues for interpreting archaeological sites (stratigraphy) Over time, debris and soil accumulate in layers Color, texture, and contents may change with each layer Archaeologists try to explain how each layer was added--if it occurred naturally, deliberately (garbage), or from the collapse of structures--and they record it in detailed drawings so others can follow
The formation, accumulation, or deposition of materials in layers, such as layers of fresh water overlying higher salinity water (salt water) in estuaries See Sigma-t
The formation of separate layers (of temperature, plant, or animal life) in a lake or reservoir Each layer has similar characteristics such as all water in the layer has the same temperature Also see thermal stratification
The process of breaking down a larger group into meaningful categories or classifications to focused corrective action or targeted intervention (Brassard, 1989) Applied to disease management, stratification is a system to evaluate factors affecting health and assigning the necessary and appropriate resources to address those factors Stratification is dynamic, and a patient's status may change with respect to any factor (American Healthways, 1999)
The layering of water due to differences in density Water's greatest density occurs at 39 Deg F (4 Deg C) As water warms during the summer, it remains near the surface while colder water remains near the bottom Wind mixing determines the thickness of the warm surface water layer (epilimnion), which usually extends to a depth of about 20 feet The narrow transition zone between the epilimnion and cold bottom water (hypolimnion) is called the metalimnion or thermocline
division into groups Stratification may also refer to a process to control for differences in confounding variables, by making separate estimates for groups of individuals who have the same values for the confounding variable
The layering of water due to differences in density The greatest density of water occurs at 39°F (4°C) As water warms during the summer, cool water remains near the bottom Wind mixing determines the thickness of the warm surface water layer (epilimnion), which usually extends to a depth of about 20 feet The narrow transition zone between the epilimnion and cold bottom water (hypolimnion) is called the metalimnion or thermocline
1 A pregermination treatment to break dormancy in seed and to promote rapid, uniform germination The seeds are exposed to moisture at a temperature just above the freezing point (1-5 deg C) for a specified time 2 Arrangement of plants in layers, for example, a stratified canopy in a forest
the placing of seeds in damp sand or sawdust or peat moss in ordere to preserve them or promote germination the act or process or arranging persons into classes or social strata a layered configuration forming or depositing in layers the condition of being arranged in social strata or classes within a group
arranged in layers where lighter water overlies denser water, especially near the sea surface (see Water & Atmosphere 8(1): 26-27) Stratification generally occurs as surface waters warm in summer–spring, and is broken down by mixing processes, such as strong winds and surface cooling, especially during winter