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How does the inner core compare in density to the other layers of Earth?

• The inner core is the least dense of all the layers of Earth.

• The inner core is the densest of all the layers of Earth.

• The inner core and outer core have the same density.

• The inner core's density is unknown.

Which is the most likely reason Earth is made of distinct separate layers?

• Volcanic lava inside Earth made the layers over time.

• Hot rocks sank to the center of Earth as it formed.

• Layers were made based on the density of rocks as Earth formed.

• Asteroids colliding with Earth formed the different layers.

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NGSS.MS-ESS2-1

Why does continental crust float higher on the mantle than oceanic crust?

• Continental crust is denser, so it floats.

• Continental crust is less dense, so it floats.

• Continental crust is much thicker than oceanic crust, so it floats higher.

• Continental crust is much thinner than oceanic crust, so it floats higher.

Which most likely explains why Earth’s inner core is solid?

• It is composed of rock that is not hot enough to melt.

• It is less dense and thick than the surrounding layers.

• It is under extreme pressure from surrounding layers.

• It is mostly diamond and other carbon-based materials.

Which of these correctly lists Earth’s layers in order from the center to the surface?

• outer core, inner core, asthenosphere, lithosphere

• asthenosphere, lithosphere, outer core, inner core

• inner core, asthenosphere, lithosphere, outer core

• inner core, outer core, asthenosphere, lithosphere

Which occurs as one goes deeper into Earth’s interior?

• density, temperature, and pressure increase

• density, temperature, and pressure decrease

• density decrease and temperature and pressure increase

• density and temperature decrease and pressure increases.

Which layers of Earth are mostly made of solid material?

• inner core and outer core

• crust and inner core

• crust and mantle

• mantle and outer core

Multiple ChoiceWhich choice describes Earth’s crust?Aa thick layer of rock floating on liquid metalBa group of continents floating on a large oceanCa warm layer of rock floating on a cold layer of rockDa thin layer of rock floating on a solid but fluid-like layer

• a thick layer of rock floating on liquid metal

• a group of continents floating on a large ocean

• a warm layer of rock floating on a cold layer of rock

• a thin layer of rock floating on a solid but fluid-like layer

Which statement best describes the density of Earth’s layers, based on their position and composition?

• The inner layers have the lowest density, while the outer layers have the highest density.

• The outer layers have the lowest density, while the inner layers have the highest density.

• The mantle has the highest density, while the crust and inner core have the lowest density.

• The mantle has the lowest density, while the crust and the outer core have the highest density.

Which geological structure refers to the upper rigid layer of Earth that consists of the crust and part of the upper mantle?

• asthenosphere

• tectonic plates

• lithosphere

• core