What Makes the Crust Move

Earth's thickest layer is the _________________.

The Earth's inner core is believed to be ______________________. 

Earthquakes are related to cracks in the crust called _______________________. 

During an earthquake ___________ travel through the crust. 

Devices called ________________ can record the vibrations in the crust. 

Scientist who study Earth are called __________________.

Pieces of Earth's crust that move along the surface are called ____________________.

The thinnest layer of the Earth is the ______________.