The map below shows a portion of the north atlantic ocean, with the mid-atlantic ridge highlighted. dashed lines parallel to the ridge show the age of sea-floor basalt, in millions of years (my). complete the table for the locations indicated by letter, and answer the accompanying questions

location distance from ridge age of sea floor rate of movement
(km) (my) (km/my)
a
b
c
d
e
1. is this ocean expanding or contracting? what is the evidence?

2. at what rate is africa moving away from or toward north america?

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

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