to go up.
layers of gases surrounding a planet or other celestial body.
building of space between charged particles. Sometimes called static electricity.
to press together in a smaller space.
tube or long, circular object.
having parts or molecules that are packed closely together.
to eject or get rid of.
to get rid of or throw out.
set of physical phenomena associated with the presence and flow of electric charge.
negatively charged subatomic particle.
to give off or send out.
to explode or suddenly eject material.
material that is able to flow and change shape.
force produced by rubbing one thing against another.
phenomenon where lava is forcefully but not violently ejected from a volcano through a fissure or vent.
small piece of material.
study of the physical processes of the universe, especially the interaction of matter and energy.
motionless electronic charge that builds up on a material.
movement of tectonic plates resulting in geologic activity such as volcanic eruptions and earthquakes.
strong, destructive force.
fragments of lava less than 2 millimeters across.
bolts of electricity produced in a volcanic plume. Also called a dirty thunderstorm.
cylinder-shaped structure of volcanic ash and gas emitted by an explosive volcanic eruption. Also called an eruption column.
an opening in the Earth's crust, through which lava, ash, and gases erupt, and also the cone built by eruptions.