Oxygen was initially created in earth's atmosphere by
●volcanoes outgassing
●cyanobacteria photosynthesizing
●greenhouse effect
●ozone breaking down

When another customer complains about the hair salon where georgeanna is a loyal customer, she defends it because she feels responsible for the continued success of the hair salon. this behavior suggests she has reached the rung of the loyalty ladder.

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

The missouri compromise angered because congress had allowed slavery to expand into another state. 1.) thomas jefferson 2.) northerners 3.) white southerners 4.) henry clay