As a young child, riley exhibited intense negative emotions and had a great deal of trouble controlling them. chris, on the other hand, was even-keeled and predictable. as adults, riley is likely to be:

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?

I'm in a few lessons on eastern europe and i need me don't leave me hanging. : {

How have people adapted physically to different environments? why do you think these differences developed?