Social mobility is not an important feature of an open class system. select the best answer from the choices provided t f

Describe how gravity and convection work together to move the plates in the plate tectonics theory

What are the answersthe words need to be put in the correct spotsabsolveadamantamiableanimosityantagonisteccentricencounterepitomemalign

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling