Because of movements at the Mid-Atlantic Ridge, the Atlantic Ocean widens by about 2. 5 centimeters each year. Explain which type of plate boundary causes this motion.

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium.b)heavier than helium.c)the same weight as helium.d)dependent on the element that reacted with carbon.

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction