cinders

lapilli

pumice

scoria

Pahoehoe exhibit smooth surfaces while aa have rough surfaces.

Pahoehoe exhibit rough surfaces while aa have smooth surfaces.

Pahoehoe form lava tubes while aa form pillow lavas.

Pahoehoe form pillow lavas while aa form lava tubes.

Krakatoa

Mount St. Helens

Tambora

Vesuvius

bombs

lapilli

pumice

scoria

Bombs are also known as lapilli and blocks are known as cinders.

Bombs are greater than 2mm and blocks are between 3mm and 54 mm.

Bombs are incandescent lava and blocks are hardened lava.

Bombs are less than 2 mm and blocks are between 2mm and 64 mm.

none of the choices

Hawaiian

Vulcanian

Strombolian

none of the choices

basaltic, andesitic

andesitic, rhyolitic

rhyolitic, basaltic

basaltic, rhyolitic

none of the choices

none of the choices

0.063

0.360

0.036

none of the choices

Pumice are bigger than scoria.

Pumice are known as little stones while scoria are floating rocks.

Pumice are lighter color and less dense than scoria.

all of the choices