I need someone to check my work please!

Question

1. A delta is made up of _______.
a. melted iron
b. sharp rocks
c. gullies
d. sand and soil ******

2. Underwater canyons form on the _________.
a. continental slope ******
b. continental rise
c. ocean ridges
d. drainage basins

3. Earth's crust is made up of _________.
a. water
b. rock
c. iron *****
d. sand

4. Study the illustration below.
layers of the Earth and it's pointing to the 2nd layer
a. outer core
b. inner core
c. mantle*****
d. crust

5. Each of these are examples of Earth's underwater features EXCEPT ________.
a. the outer core*****
b. the continental shelf
c. the continental slope
d. the ocean ridge

6. Which layer of Earth is the thinnest?
a. crust*****
b. outer core
c. inner core
d. mantle

Answer 1

#3 is rock
1.D
2.A
3.B
4.C
5.A
6.A
Thanks for the help :(