Technological advances had helped reveal that the ocean floor was not flat, as once believed, but instead was marked by 50,000-kilometer-long, 3,000-meter-high ridges and 11-kilometer-deep trenches. How do scientists explain why, if new crust is constantly being formed from volcanic materials at the ridges, Earth's crust stays the same size?
A) Seafloor spreading is the cause of new crust being added. Old crust crumbles and forms mountains throughout the Earth's surface. Mountains keep growing.
Eliminate
B) Scientists hypothesize that new crust is the result of volcanic activity throughout the Earth's surface and older magma is destroyed as it subducts during earthquakes into Earth's mantle.
C) Scientists found that the youngest oceanic crust is located nearest the mid-ocean ridge and divergent boundary and the oldest crust is at subduction zones where it sinks back into the Earth.
D) Scientists found that the oldest oceanic crust is located nearest the mid-ocean ridge and forms from volcanic activity;the youngest crust is nearest the trenches and it comes from magma flowing up to Earth's surface..
Answers: 1
Chemistry, 22.06.2019 06:30
(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.
Answers: 1
Chemistry, 22.06.2019 19:00
Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?
Answers: 1
Chemistry, 23.06.2019 03:30
The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?
Answers: 1
Technological advances had helped reveal that the ocean floor was not flat, as once believed, but in...
Mathematics, 08.05.2021 01:00
Computers and Technology, 08.05.2021 01:00
Mathematics, 08.05.2021 01:00
English, 08.05.2021 01:00
Arts, 08.05.2021 01:00
English, 08.05.2021 01:00
Mathematics, 08.05.2021 01:00
Mathematics, 08.05.2021 01:00
Biology, 08.05.2021 01:00