Primary succession is most likely caused by?

volcanic eruption.

mark my answer as brainlest

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.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.