which is NOT evidence for motion of the earths crust? a. folds, b. fracturs, c.

Question

which is NOT evidence for motion of the earths crust? a. folds, b. fracturs, c. earthquakes, d. isostasy e. density

t/f when the basaltic crust melts, sedimentary layers float upward because they are more dense than igneous rocks.

the pressure that pushes sedementary rock into folds come from a. isostasy b. verticle forces, c. horizontal compression

most of mountain ranges are made of a. extruded magma b. lava flows c. uplifted intrusive rock d. folden sedimentary rock

granite can be metamorposed into a. gnesis b. basalt c. limestone, d. slate or e. marble.

erosion exposes younger rocks in cores of a. synclines or b. anticlines

which of the following when raised by isostasy will break, rather than bend? a. sedentary rock or b granite
t/f earthquakes result from movement of th earths crust
t/f mineral and fossil evidence indicate africa and ecuador were once joined

Explanation / Answer

Multiple choices: 1. Density is not the evidence for motion of the earths crust. Hence option (e) is correct. 2. The pressure exerted by horizontal compression pushes sedementary rock into folds. Hence option (c) is correct answer. 3. Most of mountain ranges are made of extruded magma. Hence option (a) is correct. 4. Granite can be metamorposed into gnesis. Hence option (a) is correct answer. 5. Erosion exposes younger rocks in cores of synclines. Hence option (a) is correct answer. True and false: 1. False. When basaltic crust melts, sedimentary layer float because they are less denser than igneous rocks 2. False. Earthquakes results from the movement of tectonic plates. 3. True. Mineral and fossil evidence indicate africa and ecudor were once joined.

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