The image to the left shows earth's major plates. a
geologist is studying a plate boundary indicated by the
arrow.
fill in the blank to complete the statement about the
plate boundary
this boundary is between the african plate and the
plate.

answer:

info needed

explanation:

where is the image?

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.