Why is Earth's continental crust lower in density than seafloor crust?

A) Continental crust is made as the lowest-density seafloor crust melts and erupts to the surface near subduction zones.
B) Continental crust is made from the volcanic rock called basalt.
C) Continental crust comes from volcanoes, while seafloor crust comes from geysers.
D) Continental crust comes from Earth's inner core, while seafloor crust comes from the outer core.


A) Continental crust is made as the lowest-density seafloor crust melts and erupts to the surface near subduction zones.

Physics & Space Science

You might also like to view...

After the switch is closed in a series LR circuit, what is the current when a time equal to four time constants has elapsed?

A. (1/5) Imax B. (15/16) Imax C. (1/16) Imax D. 0.018 Imax E. 0.98 Imax

Physics & Space Science

What astronomical period takes 18 years 11 1/3 days to complete?

a. synodic cycle b. lunar phase cycle c. eclipse season d. sidereal period e. Saros cycle

Physics & Space Science

An electron moves with a speed of 8.0 × 106 m/s along the +x-axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x-axis and lying in the x-y plane

Calculate the magnitude of the magnetic force on the electron. A) 2.8 × 10-10 N B) 3.2 × 10-10 N C) 2.8 × 10-12 N D) 3.2 × 10-12 N E) 0 N

Physics & Space Science

A girl throws a rock horizontally with a speed of 12 m/s from a bridge. It falls 2.28 s before hitting the water below. Neglect air

(a) How high is the bridge from the water below? (b) How far horizontally does the rock travel before striking the water?

Physics & Space Science