20points [photo attached]
which of the following can be assumed about the layers in areas 2 and 4?

a. the layers were deposited in a river bed

b. the layers were formed in a marine environment

c. the layers formed from sand dunes

d. the layers were originally horizontal

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Which metal exist in liquid state and can be cut with knife ?