Question

layers, location, and navigation

1. what is the innermost layer of the earth?

a. a mantle
b. outer core
c. inner core
d. crust
2.the earth’s crust beneath the oceans is primarily composed of:
a. granite
b. basalt
c. limestone
d. sandstone

1. which layer of the earth makes up about 84% of the earth’s volume.

a. crust
b. mantle
c. outer core
d. inner core

Explanation:

1. The Earth has four main layers - crust, mantle, outer core, and inner core. The inner core is the innermost layer.
2. Oceanic crust is mainly composed of basalt. Granite is more common in continental crust. Limestone and sandstone are sedimentary rocks not characteristic of ocean - crust composition.
3. The mantle makes up about 84% of the Earth's volume. The crust is the thin outermost layer, and the cores are smaller in volume compared to the mantle.

Answer:

1. c. Inner Core
2. B. Basalt
3. b. Mantle