Stratified意思

"Stratified" is an adjective that means divided into layers or strata. It is commonly used in various fields, including geology, geography, biology, and statistics. Here are some examples of how the term is used in different contexts:

  1. Geology and Geography: In geology, stratified rocks are those that have been formed into layers due to various processes such as deposition, compaction, and cementation. For example, sedimentary rocks like sandstone and shale are often stratified. In geography, the term can be used to describe landscapes that have distinct layers or bands of different materials, such as in stratified drift (a type of soil) or in the layering of vegetation in a forest.

  2. Biology: In biology, stratification can refer to the vertical layering of organisms in an ecosystem, such as the different layers of plants in a forest canopy or the different depths at which fish are found in a lake.

  3. Statistics: In statistics and survey sampling, stratified sampling is a method of selecting a sample from a population in which the population is divided into homogeneous subgroups (strata), and a sample is taken from each subgroup. This method can improve the accuracy of the sample by ensuring that different subgroups are represented in the sample.

  4. Education: In education, stratified instruction is a teaching method that involves dividing students into groups based on ability level and providing instruction that is tailored to each group's level of understanding.

  5. Sociology: In sociology, stratification can refer to the division of society into layers based on social class, income, education, or other factors.

Overall, the term "stratified" implies a division into distinct layers or groups, each with its own characteristics or properties.