What is the earth made of?

Geography

Which two metals are the main components of the Earth’s inner and outer core?

What is the approximate temperature of Earth's inner core?

What is the approximate temperature of Earth's outer core?

What is the approximate temperature of Earth's mantle?

Tectonic plates crash into each other at high speeds and this leads to violent earthquakes and volcanic eruptions.

The slow movement of the tectonic plates leads to violent earthquakes and volcanic eruptions.

Why do volcanoes and earthquakes occur along tectonic plate lines?