showing by example; a picture

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

amazing; impressive; fantastic

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

to observe (để ý)

blowing out lava, rocks, and gases from a volcano

the vapor into which water is converted when heated, forming a white mist of minute water droplets in the air.

to answer back; to talk again (trả lời)

waves of energy that travel through the Earth

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

to hit something

not important , no need to worry, no problem