How do weathering and deposition differ? a. weathering breaks down rocks; deposition leaves them in new places. b. weathering has to do with air; deposition has to do with plants. c. weathering occurs only in summer; deposition occurs year-round. d. weathering can be chemical or physical; deposition is only chemical.

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