The outer core is made of liquid rocks, so it's very hot. The inner core is made of solid rocks. The Earth has seven plates that move a little bit every year. When the plates rub and crash into each other, it makes an earthquake. Sometimes earthquakes are small, but sometimes they are big, and makes a lot of damage.
Volcanoes often erupt at the same time as an earthquake.
Volcanos shoot hot rocks into the air. The Earth is very interesting to me. The Earth looks very beautiful from outer space. It looks mostly blue because it is mostly water. The Earth has four layers.