Earth's Structure 2

What is the name of the layer of hot, ductile material on which the lithospheric plates are riding?

• core

• crust

• divergence

• asthenosphere

Why is Earth not getting larger if the sea floor is spreading?

• because earthquakes destroy crust

• because as new crust is made at a mid ocean ridge in another location subduction destroys older crust

• because as continental crust converges with other continental crust new mountains are formed

• because volcanoes erupt and create new crust

Tags

NGSS.MS-ESS2-1

What is happening at point Y?

• Hot water is undergoing convection in the mantle, where it erodes the crust, creating an ocean basin.

• Cold water from the crust is flowing into the mantle, where it gets heated and expands, lifting the crust into a mountain range.

• Plates are being shoved together by the movement of the magma in the mantle, creating a mountain range.

• Plates are being pulled apart by the movement of the magma in the mantle, allowing magma to ooze up, creating new crust.

Tags

NGSS.MS-ESS2-2

What is the outermost layer of the Earth?

• Mantle

• crust

• core

• mesosphere

Which statement BEST describes one difference between Earth's mantle and crust?

• The mantle is less dense than the crust.

• The mantle is hot compared to the crust.

• The mantle is cool compared to the crust.

The picture shows the San Andreas Fault. The crevice along the fault is most likely caused by which event?

• earthquake

• hurricane

• tornado

• sinkhole

Tags

NGSS.MS-ESS2-2

Tectonic plates that make up Earth's crust move because of _____in Earth's mantle.​

• conduction currents

• convection currents
• gravity

• magnetic forces

Tags

NGSS.MS-ESS2-3

Which statement BEST describes the relationship between Earth's mantle and core?

• The mantle lies just below the core.

• The mantle and core are made up of hard, solid rock.

• The core is denser than the mantle.

• Material in the core and mantle combines to form tectonic plates.

Which plate boundary is shown?

• A. Divergent

• B. convergent

• C. tansform

Tags

NGSS.MS-ESS2-3

Which of the following explains why Earth has moving tectonic plates?

• The asthenosphere is molten so the plates can move around on top of it.

• The brittle lithosphere is able to break apart to continuously form different plates.

• Convection currents in the outer core provide a driving force to move the plates around.

• Subduction of old continental crust makes room for new crust forming at mid-ocean ridges.

Tags

NGSS.MS-ESS2-3