Exploring Earth's Crust and Tectonic Plates

What is the primary difference between oceanic and continental crust?

• Oceanic crust is denser and younger than continental crust.

• Oceanic crust is less dense than continental crust.

• Oceanic crust is older and more buoyant than continental crust.

• Oceanic crust is more buoyant than continental crust.

How old is the oldest continental crust ever dated?

• 4.4 billion years

• 1.2 billion years

• 3.5 billion years

• 2.6 billion years

Tags

NGSS.MS-ESS1-4

What event led to the formation of the solar system?

• A massive volcanic eruption

• A supernova explosion

• A large asteroid impact

• A collision of two planets

Tags

NGSS.MS-ESS1-2

What are the three main factors that contributed to the heat of early Earth?

• Impacts, gravitational compression, and radioactive decay

• Volcanic activity, tidal forces, and radioactive decay

• Tidal forces, solar radiation, and impacts

• Solar radiation, volcanic activity, and gravitational compression

Tags

NGSS.HS-ESS2-3

What is partial melting?

• When only part of a solid melts

• When a liquid solidifies

• When a solid turns directly into gas

• When the entire solid melts

Tags

NGSS.MS-PS1-4

Why is continental crust more felsic than oceanic crust?

• Because it forms directly from the mantle

• Because it forms at mid-ocean ridges

• Because it undergoes more partial melting at subduction zones

• Because it is denser than oceanic crust

How did Earth's atmosphere initially form?

• Through the photosynthesis of early plants

• Through volcanic outgassing

• Through the impact of comets

• Through the accumulation of gases from space

What is the lithosphere composed of?

• Only the crust

• Only the core

• Only the mantle

• Both the crust and the uppermost part of the mantle

Tags

NGSS.MS-ESS2-1

Which supercontinent existed around 300 to 180 million years ago?

• Rodinia

• Pannotia

• Columbia

• Pangea

What is the significance of the Moho boundary?

• It marks the boundary between the lithosphere and the asthenosphere

• It marks the boundary between the inner and outer core

• It marks the boundary between the crust and the mantle

• It marks the boundary between the mantle and the lithosphere