Question

Why is the Earth separated into different layers?

A.The different masses of each layer cause them to separate and layer. B.The different densities of each layer cause them to separate and layer. C.The different composition of each layer causes them to separate and layer.

D.The different volumes of each layer cause them to separate and layer.




What happens to the temperature within Earth as the pressure increases? A.The temperature remains the same.

B.The temperature decreases and then increases.

C.The temperature increases.

D.The temperature decreases.




Which of the following does not help scientists gather important information about the Earth and its layers?

A.Volcanic eruptions

B.Seismic waves

C.Earthquakes

D.Ocean currents

Answer 1

The Earth is divided into layers due to their different densities, a process known as differentiation. Temperature inside Earth increases with pressure due to geothermal energy. Information about Earth's layers comes from seismic activity, except ocean currents that are unrelated to Earth's internal structure.

Step-by-step explanation:

The Earth is separated into different layers primarily due to the different densities of each layer, which cause them to separate and layer. This separation is a result of the process known as differentiation, where gravity helps to sort the components of a planet by density. The layers of the Earth include the core, mantle, and crust, which are differentiated by their chemical compositions; and the lithosphere and asthenosphere, which are differentiated by their physical properties.

Concerning the temperature within Earth as pressure increases, it has been observed to increase. This is because as you descend deeper into the Earth, both the pressure and temperature rise due to the intense weight of the overlying rocks and the heat from the Earth's internal geothermal energy.

To gather important information about the Earth and its layers, scientists rely on evidence from volcanic eruptions, seismic waves, and earthquakes, since they provide crucial indirect data about the Earth's interior structure. The one item that does not help scientists in this endeavor is ocean currents, as they are more concerned with the Earth's surface processes and climate rather than its internal composition and structure.