How do scientists learn about the interior of the earth?

Gettysburg address question what do you notice about the length of this address? why do you think lincoln made it so short?

Tanya was used to using word, and she did some work for her brother mike, who was using wordperfect. tanya was quickly able to use wordperfect for windows with little difficulty, since many of the commands for it were the same as the commands for word. tanya's ability to use wordperfect best illustrates:

What is grievance 28 on the declaration of independence explained in simpler words? plz