In africa, desertification caused the desert to expand into the sahel region.

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?

Many members of the civilized tribes farmed

Should the u. s limit the number of terms a lawmaker can serve in congress