How did the treaty of versailles all but guarantee future conflict in europe?

Which of the following is not a common characteristic of agricultural villages throughout the world?

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?

There are 25 elements found in living things. how many of these elements are found in some organisms but not all? 1 , 6 , 19 , 25