belgaq.blogg.se - 3d earthquake models for 6th graders how to

Have students research examples of non-plate boundary faults. Explain that there is a broad range of faults based on type, linear extension, displacement, age, current or historical activity and location on contintental or oceanic crust.

Explain that not all faults are associated with plate boundaries.

What kind of fault is the San Andreas Fault? Is California likely to "fall off into the Pacific Ocean"? Why?.

What kind of faults would you expect to find along the Mid-Atlantic Ridge? Why?.

What kind of faults would you expect to find in the Himalaya Mountains? Why?.

Strike-slip faults are often associated with transform (sliding) boundaries.

Thrust faults are often associated with convergent (compressional) boundaries.Normal faults are often associated with divergent (tensional) boundaries.However, you can probably find all types of fault movement associated with each type of plate boundary. Explain that faults are often (but not always) found near plate boundaries and that each type of fault is frequently associated with specific types of plate movements.An excellent world physiographic map, showing the ocean floor, can be obtained from the National Geographic Society.Display the fault models in the classroom after the activity.Have students work in pairs or small groups.Time Neededġ or 2 Class periods Materials Needed (per group) Students will observe fault movements on a model of the earth's surface. Sites of greatest hazard are being identified, and designing structures that will withstand the effects of earthquakes. Scientists have begun to estimate the locations and likelihoods of future damaging earthquakes. Today we are challenging the assumption that earthquakes must present an uncontrollable and unforecastable hazard to life and property. If the earthquake occurs in a populated area, it may cause many deaths and injuries and extensive property damage. When the accumulated energy grows strong enough, the plates break free.

At other times, the plates are locked together, unable to release the accumulating energy. For hundreds of millions of years, the forces of plate tectonics have shaped the Earth as the huge plates that form the Earth's surface slowly move over, under and past each other. An earthquake is a sudden movement of the Earth, caused by the abrupt release of strain that has accumulated over a long time. One of the most frightening and destructive phenomena of nature is a severe earthquake and its terrible aftereffects.