Earth Layers*

What is the composition of the inner core?

• Solid iron and nickel

• Liquid iron and sulfur

• Solid aluminum and magnesium

• Liquid nickel and cobalt

What is the crust?

• The crust is the thickest layer of the Earth, composed of liquid rock.

• The crust is the thinnest layer of the Earth, composed of solid rock, and forms the Earth's surface.

• The crust is a layer of gas surrounding the Earth.

• The crust is the layer of the Earth that contains the majority of its water.

What are tectonic plates?

• Large sections of the lithosphere that move and interact at their boundaries, causing earthquakes and volcanic activity.

• Thin layers of soil that cover the Earth's surface.

• Solid rocks that do not change over time.

• Liquid layers beneath the Earth's crust that cause flooding.

What is the lithosphere?

• The outermost layer of the Earth, consisting of the crust and the uppermost part of the mantle.

• The layer of the Earth where tectonic plates float on molten rock.

• The innermost layer of the Earth, composed mainly of iron and nickel.

• The gaseous layer surrounding the Earth, primarily made up of nitrogen and oxygen.

What is the thickness of the Earth's crust?

• 1 to 10 kilometers

• 5 to 70 kilometers

• 100 to 150 kilometers

• 200 to 300 kilometers

What is the temperature of the outer core?

• 2,000 to 3,000 degrees Celsius

• 4,000 to 6,000 degrees Celsius

• 6,000 to 8,000 degrees Celsius

• 8,000 to 10,000 degrees Celsius

What is the difference between the upper mantle and lower mantle?

• The upper mantle is completely solid, while the lower mantle is partially molten.

• The upper mantle is partially molten and allows for tectonic plate movement, while the lower mantle is more solid and extends to the outer core.

• The upper mantle is thicker than the lower mantle, which is thinner and more fluid.

• The upper mantle is cooler than the lower mantle, which is hotter and more active.

What is the mantle?

• A layer of gas surrounding the Earth

• The thick layer of rock between the Earth's crust and outer core

• The outermost layer of the Earth

• A type of volcanic rock

What is the inner core of the Earth?

• A solid, innermost layer composed mainly of iron and nickel, with the greatest density.

• A liquid layer surrounding the outer core.

• A gaseous layer that contains most of the Earth's atmosphere.

• A semi-solid layer made up of silicate minerals.

What is the significance of the lithosphere in plate tectonics?

• The lithosphere is a solid layer that does not move.

• The lithosphere is broken into tectonic plates that float on the semi-fluid asthenosphere, allowing for movement and interaction.

• The lithosphere is the innermost layer of the Earth.

• The lithosphere is responsible for the Earth's magnetic field.