Plate Tectonics

Question 1

Angle of inclination at magnetic equator is ___ degrees.

Answer 1

0

Question 2

Angle of inclination at magnetic north pole is ____.

Answer 2

90 degrees

Question 3

Why do plots for apparent polar wandering paths not line up?

Answer 3

Continents have moved since the time rocks have been magnetized.

Question 4

The Earth’s magnetic field has reversed polarity over time. _____ are evidence for this.

Answer 4

magnetic stripes on the ocean floor

Question 5

From hot spot tracks we know plates move from in the direction from _____.

Answer 5

youngest island to oldest island

Question 6

characteristics of suture stage

Answer 6

thrust faults, vertically thickened crust

Question 7

Lava flows record ______through time.

Answer 7

magnetic fields

Question 8

Evidence for geomagnetic reversal

Answer 8

magnetic stripes on ocean floor

Question 9

what type of rock would be good for recording earths magnetic field through time.

Answer 9

lava flows

Question 10

Earth acts like electromagnet. ____ acts like the metal and ____ acts like current circling the metal.

Answer 10

solid metal inner core, convecting liquid outer core

Question 11

angle of inclination is almost equitable to ____.

Answer 11

lines of latitude

Question 12

geomagnetic reversal is when

Answer 12

magnetic poles swich so north pole becomes south pole

Question 13

what does it mean when isochrones are closely spaced

Answer 13

slow spreading rate, slow velocity

Question 14

what can record Earth’s magnetic field over time?

Answer 14

volcano lava flows and seafloor spreading

Question 15

When did seafloor spreading begin in the image below?

Answer 15

>120 MA