How does the temperature of the earth’s mantle compare to the other layers of the earth?
a) the mantle is hotter than the core.
b) the mantle is hotter than the crust.
c) the mantle is the same temperature as the core.
d) the mantle is the same temperature as the crust.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.