The intensity and strength of an earthquake is measured with a ________________________.

The layer of Earth that is the most dense is the ___________.

The inner core of our planet is likely solid (not liquid) primarily due to the intense _____________________.

The thickest geologic layer inside our planet is the ___________.

With respect to geologic time, we are currently in the _________________ era.

Planet Earth is estimated to be __________________ years old.

Dinosaurs existed during the _______________________ era.

_______________ have been used to help solve the theory of continental drift.

This is a concept map of ___________________________.

The first scientist to suggest the theory of "Continental Drift" was ______________________________.

Yucca Mountain (in Nevada) is a place in the USA where it has been proposed that we store ____________________ due to its stable geologic features.

This chart/graph is an example of a(n) _________________________ reading which tells how strong a(n) ________________________ was.