Earth's tallest mountain ranges are formed at plate boundaries.

a. oceanic-continental
b. subducting
c. oceanic-oceanic
d. continental-continental

Most tornadoes carry winds speeds in a range of km per hour

Read the article titled "castro resigns." why did the us impose trade sanctions against cuba in 1962?

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?