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Chapter 9
science grade 6 unit C
| Question | Answer |
|---|---|
| earth's crust is broken up into irregularly shaped sections called | plates |
| the point on the earth's surface directly above the focus of an earthquake is call the | epicenter |
| the thin outer layer of earth of which the continents are a part | crust |
| thin layers of sediment | strata |
| huge ocean waves caused by earthquakes | tsunamis |
| the point directly below the epicenter where an earthquake begins | focus |
| another name for earthquake vibrations | seismic waves |
| earth layer just beneath the crust | mantle |
| remains of once living organisms | fossils |
| the earth's lithosphere is broken up into | techtonic plates |
| the preserved remains of a plant or animal in the rock record is called a | fossil |
| sedimentary rock is deposited in layers called | strata |
| a huge ocean wave usually caused by an earthquake | tsunami |
| earthquakes produce _____________ that travel far from the earthquake's focus | seismic waves |
| thick layer of dense rock below earth's crust | mantle |
| when magma flows up and fills the space at many divergent boundaries | sea-floor spreading |
| made of the earth's crust and the upper part of the mantle | lithosphere |
| the place along a fault where rock first begins to move during an earthquake | focus |
| the hypothesis of _____ states that the continents were once massed together in a supercontinent called Pangaea | continental drift |
| geologic activities such as earthquakes and volcanoes often occur | at plate boundaries |
| the spot on earth's surface directly over the place where rock began to move along the fault | epicenter |
| all the continents of earth were once part of one large landmass known as | Pangaea |
| two plates push together | convergent boundaries form |
| two plates move apart | divergent boundaries form |
| two plates slide horizontally past each other | transform fault boundaries occur |
| earthquakes produce three types of waves | primary waves (P-waves), secondary waves (S-waves) and surface waves (L-waves) |
| earthquake waves that travel the fastest | primary waves (P-waves) |
| one way of determining the age of a fossil | through the strata of rock in which it is found |
| three types of mountains | fold mountains, fault-block mountains, volcanic mountains |
| mountains form where | tectonic plates collide |
| the most common event that occurs along a transform fault boundary | earthquake |
| many volcanoes occur around the edges of the Pacific Ocean in an area called the | Ring of Fire |
Created by:
foustk
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