Large deposits of gypsum and other evaporite minerals are evidence of
A) volcanic activity during the Cambrian period.
B) dried up shallow seas from the Silurian period.
C) seafloor spreading during the Permian period.
D) glaciation during the Triassic period.
Answer: B
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Sketch five isotherms and appropriate heat flow lines for heat transfer per unit depth through a 5 cm x 5 cm square where the heat flow is from a high temperature corner and another isothermal as the side of the square.
What will be an ideal response?
Force on a Moving Charge: We observe that a moving charged particle experiences no magnetic force. From this we can definitely conclude that
A. no magnetic field exists in that region of space. B. the particle must be moving parallel to the magnetic field. C. the particle is moving at right angles to the magnetic field. D. either no magnetic field exists or the particle is moving parallel to the field. E. either no magnetic field exists or the particle is moving perpendicular to the field.
What would Earth's average surface temperature be if it had no greenhouse effect?
A) below the freezing point of water B) slightly above the freezing point of water C) about 10°C D) the same temperature as it is with the greenhouse effect E) slightly warmer than it is with the greenhouse effect
The transit method seeks to detect planets by
A) precisely measuring distances to stars. B) directly detecting the light of planets orbiting stars. C) measuring small changes in the positions of stars on the sky. D) precisely measuring the velocities of stars moving toward and away from us. E) measuring small changes in the apparent brightness of stars.