Earth's layers are sorted by ____________. Fill in the blank(s) ...

[washai]

Earth's layers are sorted by ____________. Fill in the blank(s) with the appropriate word(s).

Question 2

____________ of the same plant and animal species were found in both Africa and South America, which supported
  the continental drift theory. Fill in the blank(s) with the appropriate word(s).

[djofnc]

Answer to Question 1

density

Answer to Question 2

Fossils
Remnants
Remains

[washai]

YES! Correct, THANKS for helping me on my review

[smrtceo]

Thanks for the timely response, appreciate it