What geologic features are explained by plate tectonics?
What will be an ideal response?
Answer: Mountain ranges, volcanoes, plutonic rocks, metamorphic rocks, folded and faulted rocks are all explained by plate tectonics. Virtually all geologic processes can be tied back to plate tectonics.
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Suppose the ends of a 30-m-long steel beam are rigidly clamped at 0°C to prevent expansion. The beam has a cross-sectional area of 30 cm2. What force against the clamps does the beam exert when it is heated to 40°C? (?Steel = 1.1 × 10?5/°C, Ysteel = 20 × 1010 N/m2).
What will be an ideal response?
Spherical Mirrors: Which statements about images are correct? (There could be more than one correct choice.)
A. A virtual image cannot be formed on a screen. B. A virtual image cannot be viewed by the unaided eye. C. A virtual image cannot be photographed. D. A real image must be erect. E. Mirrors always produce real images because they reflect light.
The region around Earth where the magnetic field traps charged particles is the:
A) ozone layer. B) exosphere. C) Van Allen Radiation Belts. D) corona. E) aurora borealis and australis.
Which of the following phenomena results from limestone being dissolved by rainwater?
a. Caverns b. Delta formation c. Sea arches d. Beaches