True or False: The shape of Earth's magnetic field resembles that produced by a laboratory bar magnet.
Indicate whether this statement is true or false.
Question 2
Judge the following sentences according to the criteria given below. A student disputes the process of mantle convection. They argue that rock is solid and cannot flow.
They challenge their classmates to provide evidence for present day mantle convection. A classmate shows them a seismic tomographic map and cross section showing variations in S-wave velocities.
A) The seismic tomographic map and cross section do show evidence for present day mantle convection and offers a strong affirmation of mantle convection.
B) The seismic tomographic map and cross section do show evidence present day mantle convection but this data cannot be used as evidence for mantle convection.
C) The seismic tomographic map and cross section has a random pattern of S-wave velocities and offers no evidence for anything.
D) The seismic tomographic map and cross section shows evidence for mantle convection in the past but not for present day mantle convection.
Mira as seen from the Earth
False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth.
Earth’s Major Tectonic Plates
Saturated and Unsaturated Fatty Acids Help Shape Foods Saturated fatty acids
Midsagittal section indicating locations of true and false pelves
Survivorship curves. Blue lines are theoretical curves. Red dots are data from field studies.