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Science Section1a
Earth's Crust in Motion
| Question | Answer |
|---|---|
| Stress | a force that acts on rock to change its shape or volume |
| Types of Stress | Shearing, Tension, Compression |
| Shearing | stress that pushes a mass of rock in two opposite directions |
| Tension | stress that pulls on the crust, stretching rock so its thinner in the middle |
| Compression | stress force that squeezes rock until it folds or breaks |
| Deformation | change in the volume or shape of Earth's crust |
| Fault | a break in Earth's crust where slabs of crust slip past each other |
| Where do faults usually take place? | along plate boundaries |
| Strike-Slip Faults | rock on either side of the fault slip past each other sideways with little up or down motion |
| Tension forces in Earth's crust | Normal Faults |
| Compression forces produce? | Reverse Faults |
| Fault-block mountain | when normal faults uplift a block of rock |
| Folds | bends in rock that form when compression shortens and thickens part of the Earth's crust |
| Anticline | a fold in a rock that bends upward into an arch |
| Syncline | fold in a rock that bends downward in the middle to forma bowl |
| Plateau | large area of flat land elevated high above sea level |
| What are the three main types of stress in rock? | Shearing, Tension, Compression |
| What is any change in the volume or shape of the earth? | Deformation |
| What is an earthquake? | the shaking and trembling that results from the movement of the Earth's surface |
| Shearing is associated with what type of plate boundary? | Transverse boundary |
| What are the names of the three different faults? | strike-slip fault, normal fault, reverse fault |
| Faults are made of two different parts the hanging wall and the legwall-true or false | false |
| Normal faults include the stresses of tension and compression | false |
| A Plateau is a large steep pointy mountain that is difficult to ride your bike down-true or false | false |
| Anticlines and synclines are two terms that geologists use to describe the folds in the Earth's crust, caused by compression-true or false | true |
| Anticlines and synclines are two terms that geologists use to describe the folds in the earths crust, caused by compression-true or false | true |
| Over millions of years, fault movement can change a flat plain into a towering mountain range-true or false | true |
| A fold in a rock that bends downward like a bowl | Syncline |
| When a normal fault uplifts a block of rock | fault block mountains |
| A fault line that is associated with the stress of tension | Normal fault |
| Bends in the Earth's crust that is caused by compression | folds |
| This type of fault is assocated with a tranform boundary | Strike-slip-fault |
| A fault line that is associated with the stress compression | Reverse fault |
| Any change in the volume or shape of the Earth's crust | deformation |
| A fold in the rock that bends upward into an arch | anticline |
Created by:
carmana
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