amazing; impressive; fantastic

waves of energy that travel through the Earth

a serious or dangerous situation that needs immediate action

A theory stating that the earth's surface is broken into plates that move.

A two-dimensional, or flat, representation of Earth's surface or a portion of it.

a colorful, glowing display in the sky caused when particles from the sun strike oxygen and nitrogen atoms in the ionosphere; also called the Northern Lights

To cause to burst in pieces by force from within. To blow up

a flow of hot liquid rising into the air when a volcano erupts

not important , no need to worry, no problem

A volcano that has not erupted for a long time, but may erupt again one day.

to answer back; to talk again (trả lời)

southern lights; caused by solar wind