a volcano made of cinder (ashes) with steep sides and a bowl-shaped crater

a volcano made of alternating layers of lava and cinder or ash

term used to describe a volcano that is not active

shaking of the ground caused by the sudden release of energy that is stored in the bedrock

the place on the surface of the Earth that is directly above the focus of an earthquake

the term used when a volcano becomes active

a crack in the bedrock along which rocks break and move during an earthquake

the place deep in the Earth's crust where an earthquake begins

a place under the Earth's crust at which magma is forced up to the surface because the temperature is much greater than normal

the scale used to measure the strength of an earthquake

the machine used to measure the strength of earthquakes

a volcano with gently sloping layers composed of cooled magma

an opening in Earth's crust that can release lava, smoke, and ash when it erupts

A giant wave usually caused by an earthquake beneath the ocean floor.