Awave that consists of changing electric and magnetic fields and that can travel through empty space is a(n)

d

explanation:

i think the answer is d. but im not sure!

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

conduction, convection, radiation