ACTIVITY 2.: MYSTERY WORD DIRECTION: Arrange the jumbled letters to form the word that corresponds to its
description.
VRETSRSANE EWVA
Hint: It is a wave in which the direction of the wave's propagation is perpendicular to
the direction of the particles displacement
ECMAHLINAC EVAW
Hint: It is the wave which propagates only in a material or medium.
ALNIDUTGLONI WVEA
Hint: A mechanical wave whose particle displacement is parallel to the direction of
the waves propagation.
LROCGTNEAMECITE EAVW
Hint: It is a wave which does not necessary requires a material medium for its
propagation and own also travel through a vacuum.
REPCMOSISNO​

1.transverse waves

2.mechanical waves

3.longitudal waves

4.electromagnetic waves

it have destructive character

  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-