What was the result of geologists trying to disprove the idea that the continents were all once together as once land mass by testing minerals and fossils on different continents? Mineral and fossils did not match up helping to dispute Wegener’s theory
Mineral and fossils matched on separate continents adding evidence in support of Wegener’s theory
The minerals match from separate continents but the fossils did not keeping Wegener’s idea still unsupported
The fossils matched from separate continents but the minerals did not keeping Wegener’s idea still unsupported

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

  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-

answer seismograph;