When using science to investigate physical phenomena, which characteristic of the event must exist?

Select 3 oral histories from the section entitled, "oral histories of long walk events", and explain how you would feel if this experience happened to you

What was a result of the use of farming machines

Is the weather changing? consider the data of severe weather that includes tornadoes occurring throughout the u. s. over the last four years. compare the severe weather for the last three years. then compare the first three months of 2017 with that data. based on previous years, what might the prediction be for weather during 2017?