Answer to Question 1ANS: C
Magnetite is in the mantle. When new crust is formed, the magnetite is in that crust. As it cools, it
points in the direction of the current magnetic field of the Earth. This allowed scientists to determine
the direction of magnetic fields throughout history. Information can be found in the section The
Confirmation of Plate Tectonics
Answer to Question 2ANS: C
The asthenosphere remains pliable due to the internal heat of the Earth. This heat is thought to travel
through the Earth's interior via conduction. The lithosphere is able to remain in motion because of that
pliability. Information can be found in the section A New Understanding of Earth Evolved Slowly.
Furchgott's discovery that endothelial cells produce a vasodilating substance.
A Piece of Mars on Earth
The first step in field recovery involves surveying the site, sometimes with special equipment.
Some drug labels show the USP symbol; others do not.
Testing motor function of cranial nerve VII - Show teeth
Earth’s Oldest Preserved Rocks – 3.8 Billion Years Old, Greenland