Plate Tectonics

The actual temperature at the boundary between the stiffer mantle and the outer core is estimated to be approximately

• 1.5°C

• 250°C

• 3000°C

• 5000°C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In which area of Earth's interior is the pressure most likely to be 2.5 million atmospheres?

• asthenosphere

• stiffer mantle

• inner core

• outer core

The thinnest section of Earth's crust is found beneath

• A. oceans

• B. desert regions

• C. coastal plains

• D. mountain regions

What is the approximate temperature at the mantle-outer core boundary?

• 1,500°C

• 4,500°C

• 5,000°C

• 7,000°C

Compared to the continental crust, the oceanic crust is

• thicker

• more dense

• more granitic

• more felsic

The composition of Earth's core is thought to be the same as the composition of many

• meteorites

• volcanic ashes

• granites

• basalts

Tags

NGSS.MS-ESS2-1

Compared to Earth's crust, Earth's core is believed to be

• less dense, cooler, and composed of more iron

• less dense, hotter, and composed of less iron

• more dense, hotter, and composed of more iron

• more dense, cooler, and composed of less iron

The observed difference in density between continental crust and oceanic crust is most likely due to differences in their

• composition

• thickness

• porosity

• rate of cooling

Beneath which surface location is Earth's crust the thinnest?

• East Pacific Ridge

• the center of South America

• Old Forge, New York

• San Andreas Fault

Point X is located in which Earth layer?

• A. rigid mantle

• B. stiffer mantle

• C. asthenosphere

• D. outer core