Volcanic bombs have a twisted, streamlined shape, which indicates ...

[ericka1]

Volcanic bombs have a twisted, streamlined shape, which indicates that they ____.
 A)cooled quickly underwater
 B)were formed from ropy, viscous mafic flows
 C)were erupted as globs of magma that cooled and solidified during their flight through the air
 D)have high amounts of dissolved gases and low amounts of sodium
 E)were erupted gently from a shield volcano and cooled as they moved downslope

Question 2

What two processes, which began during the Archean, can account for the introduction of free oxygen into the atmosphere?

[lolol]

Answer to Question 1

C

Answer to Question 2

The two processes are photochemical dissociation and photosynthesis.

[ericka1]

Excellent

[JaynaD87]

Thanks for the timely response, appreciate it