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Earth Science 11 Name: ___________________________ Block: _______ Activity 3-9: Mountain Building 1. Fill in the blanks. Select from the following list: dome folded fault block steep perpendicular parallel high low old young tilted temperature divergent convergent transform erosion stocks plastic brittle uplifting laccolith volcanism exposed rounded Most mountain building occurs at _______________ plate boundaries, and the resulting mountain ranges are oriented _______________ to the plate boundaries. _______________ mountains are characterized by _______________ elevation, sharp peaks, and _______________ slopes. As a mountain ages, weathering and _______________ wear it down to a lower, more _______________ shape. The most common type of mountain is a _______________ mountain. Folds occur deep within the crust, where high _______________ and pressure causes rock to behave in a _______________ manner. The folded rock is later uplifted and _______________. _______________ mountains result when sections of the crust are _______________ and faulted. Igneous activity can result in mountain formation, either through _______________ or through exposure of large igneous intrusions such as _______________ or batholiths. _______________ mountains can be formed in two ways: by _______________ forces which cause rock layers to buckle upwards, or by emplacement of a magma body called a _______________. 2. Match each statement with the appropriate term. _____ Associated with a laccolith. A) folded mountain _____ Formed when the crust tilts & cracks. B) fault block mountain _____ Forms the core of BC’s Coast Mountains. C) tectonic dome mountain D) plutonic dome mountain _____ A mushroom shaped pluton. _____ Formed when rock is compressed and bent. E) anticline _____ The bottom part of a fold. F) syncline _____ The top part of a fold. G) laccolith _____ Shaped like an anticline in all directions. H) batholith Questions 3 to 8: True/False Plus – Indicate if each statement is true or false. If it is false, change the underlined word or phrase to make it true. 3. Fault block mountains are formed when magma intrudes and pushes rock layers upwards. 4. The Rocky Mountains were formed entirely by the folding of sedimentary rock layers. 5. The Himalayas are considered to be very old mountains. 6. The presence of water can help rock layers to fold instead of breaking. 7. Most mountain ranges form at transform plate boundaries. 8. Shield volcanoes are most commonly formed above hot spots. 9. Would you expect to find extensive mountain building taking place in Australia? Explain your answer.
