Choose all the answers that apply.

The crust is:

1. the thinnest layer
2. made of large pieces called plates
3. mostly made of silicon dioxide
4. the outermost layer of the earth
5. also called the hydrosphere

#1 and #2

Explanation:

The Crust is both the thinnest layer of the Earth's lithosphere as well as the outermost layer of the lithosphere.

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker