Complete the sentences.
Earthquakes start () Earth's surface. During an earthquake, ().
above . . . the ground shakes above . . . the ground gets colder below . . . the ground shakes below . . . the ground gets colder
When an earthquake happens, the ground shakes. The word earthquake comes from the words earth and quake. The word earth means ground, and the word quake means to shake.
All earthquakes start below Earth's surface.