Choose all the answers that apply. the earth's crust: is one solid land mass is broken into pieces has seven main plates is mostly made of iron and nickel is mostly made of silicon dioxide

The correct answers with brief explanation:

Is broken into pieces  

- The crust is indeed broken into different pieces, also known as plates, which moves according to the movement of magma.

Has seven main plates

- There are seven main plates indeed, namely the Pacific Plate, Indo-australian Plate, Eurasian Plate, Antarctic Plate, Africa Plate, South America Plate and North America Plate.

Is mostly made of silicon dioxide

- This is correct as the crust is made up of 59% silicon dioxide also known as silica.

Hope it helps!

Your answers are B, C, and E

Explanation: Your welcome