Earth's Sphers and Layers

Front

What is the Earth's inner core?

Back

The Earth's inner core is the innermost layer of the Earth, composed primarily of iron and nickel, and is under extreme pressure and temperature.

Front

What is the thickest layer of the Earth?

Back

The thickest layer of the Earth is the mantle.

Front

What are the lithosphere and asthenosphere collectively called?

Back

The lithosphere and asthenosphere together are called the Upper Mantle.

Front

How do scientists learn about Earth's interior indirectly?

Back

Scientists learn about Earth's interior indirectly through the study of seismic waves.

Front

What is the lithosphere made of?

Back

The lithosphere is made of the uppermost mantle and the crust.

Front

What is the outer core?

Back

The outer core is a liquid layer composed mainly of iron and nickel, located beneath the mantle and surrounding the inner core.

Front

What is the asthenosphere?

Back

The asthenosphere is a semi-fluid layer of the upper mantle that allows for the movement of tectonic plates.

Front

What is the difference between oceanic crust and continental crust?

Back

Oceanic crust is thinner and denser than continental crust, which is thicker and less dense.

Front

What role do seismic waves play in understanding the Earth's structure?

Back

Seismic waves help scientists infer the composition and state of Earth's interior by analyzing how they travel through different layers.

Front

What is the composition of the Earth's crust?

Back

The Earth's crust is primarily composed of silicate rocks and minerals.