Briefly explain plate tectonics in terms of convection. (Plate tectonics and work)
What will be an ideal response?
Answer: Through convection, a process involving heat energy, plates move towards one another and collide at convergent boundaries. The lighter, cooler rock from the Earth's surface sinks, while less dense rock expanded by radioactive heating in the interior rises. Convection motion of the mostly solid mantle is extremely slow.
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The density of air that we breathe at standard room conditions is 1.2 kg/m3 . Express the density in U.S. Customary units. Show the conversion steps.
What will be an ideal response?
Judge the following sentence according to the criteria given below: The barycenter is halfway between the Earth and the Moon BECAUSE Earth's mass is so much greater than that of the Moon
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
What happens at an oil refinery?
A) Oil is separated into its component compounds. B) Oil is microfiltered to remove small dirt and rock particles. C) Oil is heated to high temperatures to evaporate off harmful impurities such as radon. D) Oil is made more viscous by evaporating off most of the water. E) Oil is turned into a cleaner-burning material called synfuel.
The age of the oldest amphibian fossils is
a. Early Devonian. d. Early Silurian. b. Late Silurian. e. Cambrian. c. Late Devonian.