What was the purpose of the writing that was developed on oracle bones in ancient China?

Mr. mann's science students were experimenting with speed. they set up a 1 meter (100 cm) track. the students used balls instead of cars. the balls were different sizes and made of different materials. four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. some of their data are shown in the table. which ball will take the longest to complete one lap around the track?

The areas with the highest population density in europe are most likely to be

How did the kansas-nebraska act contradict the missouri compromise?