What is this?
Earthquake
What is this?
Volcanic eruption
What is an Earthquake?
An earthquake is a sudden, rapid shaking of the ground caused by the breaking and shifting of rock beneath the Earth's surface.
What causes an earthquake?
...
How do we measure earthquakes?
Earthquakes are measured using instruments called seismographs (or seismometers), which detect and record ground vibrations (seismic waves)
What is the Pacific "Ring of Fire"?
90% of the world' earthquakes happen there
What is the layer of the Earth where earthquakes occur?
The crust
The point of an earthquake on the Earth's surface is called the ___________ .
Epicenter
The place inside the Earth where the earthquake starts is called the _______.
Focus (hypocenter)
What is a volcano?
A volcano is a vent or opening in the Earth’s crust
What is the name of the hot molten rock inside a volcano?
Magma
The released molten rock on the surface is called .... ?
Lava
A volcano that is no longer active is ......?
Extinct
