Journey to the Core: The Layers of the Earth Quiz

If the outermost layer of a planet is the one where life exists and the ground is solid, and if the Crust is the Earth's outermost solid shell, then the Crust is the layer where humans live.

If the Earth is divided into layers based on volume, and if the middle layer between the crust and the core is the largest by far, then the Mantle is the thickest layer.

If the pressure at the center of the Earth is high enough to squeeze atoms together despite extreme heat, then the metal cannot melt. If it cannot melt, then the Inner Core must be solid.

If the Earth's core is made of heavy dense metals that sank to the center during formation, and if scientific study shows these are primarily iron and nickel, then Iron and Nickel are the correct components.

If the temperature in a specific layer is high enough to melt iron but the pressure isn't high enough to keep it solid, then that layer is liquid. Since this occurs in the Outer Core, then it is the only liquid layer.

If energy is trapped from the Earth's formation and radioactive decay occurs in the core, then heat builds up internally. If heat builds up internally, then the temperature must increase as you go deeper.

If the crust under the ocean is made of heavy basalt rock and the crust under land is made of lighter granite, then the crust under the ocean is denser. If it is denser, then it is the Oceanic Crust.

If the mantle behaves like a "plastic" or "silly putty" that flows very slowly over millions of years but is mostly solid rock, then it is not a liquid ocean. Therefore, the statement is false.

If the Outer Core is made of liquid iron and nickel that flows and swirls, and if moving metal creates an electric current, then this movement must generate the Earth's magnetic field.

If we group the rigid, brittle outer parts of the Earth together as one mechanical layer, then we use the term Lithosphere. Since the crust and upper mantle fit this, then Lithosphere is the answer.

If pressure is caused by the weight of everything above pushing down, and if the Inner Core has every other layer of the Earth sitting on top of it, then the Inner Core experiences the highest pressure.

If the Crust is hard rock, the Mantle is mostly solid rock, and the Inner Core is solid metal due to pressure, then A, B, and D are solid. Since the Outer Core is liquid, it is excluded.

If the Earth's rigid outer shell is not one solid piece but is cracked into segments, and if these segments float on the mantle, then they are scientifically called Tectonic Plates.

If we analyze the light-colored, less dense rock that makes up the landmasses, and if that rock is identified as granite, then the Continental Crust is indeed mostly granite.

If the Earth were an apple, the crust would be as thin as the apple's skin. If all other layers are thousands of miles thick and the crust is only 5-70 km thick, then the crust is the thinnest layer.

If there is a specific zone in the upper mantle where heat makes rock soft enough to flow slowly, then that zone is the Asthenosphere. Since plates move because of this layer, then it is the Asthenosphere.

If the core is as hot as the surface of the Sun due to extreme pressure and energy, and if the Sun's surface is about 5,500 degrees C, then the Inner Core's temperature is in the 5,000-6,000 range.

If the deepest hole ever drilled is only about 12 kilometers deep, and if the distance to the center is over 6,000 kilometers, then humans have not reached the center. Therefore, the statement is false.

If heat tries to melt metal but pressure forces the atoms to stay locked together in a solid state, then pressure wins at the very center. If pressure is highest at the center, then the Inner Core remains solid.

If heat in the mantle causes rock to rise and sink in convection currents, and if these currents push against the crust above, then the Mantle is the layer driving the movement of the plates.