1. How are layers of rocks evidence that the Earth has changed over time? (2 Points) A. Each layer of rock tells us what type of rock was on the surface at that time. B. The oldest layers are near the bottom. C. The K-Pg boundary indicates a major event 65 million years ago. D. These formations have always been here, since the Earth formed with little change. E. The different formations show the type of erosion that happened in that area.

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

How to convert a density of 0.791g/cm3 to lb/ft3

Acontrol during an experiment. might change remains constant does not exist does change