Table of Contents
What does the rubber band represent in deformation of rocks?
When rocks are stressed, the resulting strain can be elastic, ductile, or brittle. This change is generally called deformation. Elastic deformation is strain that is reversible after a stress is released. For example, when you stretch a rubber band, it elastically returns to its original shape after you release it.
What causes rock deformation that lead to earthquakes?
Deformation results from plate tectonic forces and gravitational forces. The type of deformation that takes place during an earthquake generally occurs along zones where rocks fracture to produce faults.
What is elastic deformation earthquakes?
The elastic rebound theory is an explanation for how energy is spread during earthquakes. As rocks on oppo- site sides of a fault are subjected to force and shift, they accumulate energy and slowly deform until their inter- nal strength is exceeded.
What is rock deformation?
Within the Earth rocks are continually being subjected to forces that tend to bend them, twist them, or fracture them. When rocks bend, twist or fracture we say that they deform (change shape or size). The forces that cause deformation of rock are referred to as stresses (Force/unit area).
What does the rubber band in the earthquake machine represent?
The rubber band represents the elastic properties of the surrounding rocks, storing potential energy as they are deformed (yes, rocks actually bend elastically!). The sandpaper represents the contact between the sides of the fault.
What are the three types of rock deformation?
When a rock is subjected to increasing stress it passes through 3 successive stages of deformation. Elastic Deformation — wherein the strain is reversible. Ductile Deformation — wherein the strain is irreversible. Fracture – irreversible strain wherein the material breaks.
What are the types of rock deformation?
What does the movement of the chain of rubber bands represent what does the block of wood represent?
The wood block represents the active section of a fault, while the rubber band represents the elastic properties of the surrounding rock that store potential energy.
What is the rock deformation?
What is an earthquake Grade 4?
The sudden shaking of the ground that occurs when masses of rock change position below Earth’s surface is called an earthquake. The shifting masses send out shock waves that may be powerful enough to alter the surface, thrusting up cliffs and opening great cracks in the ground.
Which of the following causes rock deformation?
Stress causes rocks to deform, meaning the rocks change size or shape. There are different kinds of stress that rocks experience, and these determine how the rocks deform. Tensional stress is when rock is stretched apart.