Mendel actually discovered ________, but didn’t realize it. 

Concerning relative ages of the granite and sandstone, ________. 

What was formerly called Brontosaurus is now called ________.

About 88% of geological time is represented by the time span informally called the ________.

Pangea began to break up during the ________ Era.

Numerical ages for boundaries between time units on the geologic time scale primarily resulted from the study of ________, in conjunction with relative age data. 

Which of the following contains only Paleozoic Periods? 

The ________ are a geologically old mountain range that folded and deformed during the late Paleozoic.

Dinosaurs first appeared during the ________ period.

The first scientist to theorize the past presence of glaciers in Europe was ________.