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6th Grade Ch 3
3.1-3.4
| Definition | Term |
|---|---|
| Any trembling or shaking of the earth's crust is defined as an _____________. | earthquake |
| The place at ground level that is directly above the focus of an earthquake is known as the __________________. | epicenter |
| The point underground where an earthquake begins is called the ______________. | focus |
| A break that appears at the boundary between two moving masses of rock is known as a _________. | fault |
| Earthquakes sometimes cause monstrous waves called ___________. | tsunamis |
| The strength of an earthquake is called its ________________. | magnitude |
| _____________ weathering occurs when natural acids slowly eat into a rock, breaking it apart. | chemical |
| The temperature of rocks _______________ with depth (increases or decreases?) | increases |
| A _______________ is created when trapped gases blast through the earth's surface. | vent |
| A ______________ allows molten rock and hot gases to escape from within the earth. | volcano |
| The study of earthquakes is called _____________. | seismology |
| The underwater mountain ranges are called ______________. | midoceanic ridges |
| The boundary between the earth's crust and mantle is called ____________. | Moho |
| The process by which new soil is formed as rocks crumble and break into smaller pieces is called _______________. | weathering |
| Scientists who study the structure of the earth are called ________________. | geologists |
| A volcano that has been active at some time, but has not had a recent eruption is called a _____________ volcano. | dormant |
| A volcano that produces lava fountains or fire curtains is called ______________. | Hawaiian eruption |
| A volcano characterized by hot clouds of gas and dust that it expels is called _______________. | Plinian eruption |
| A volcano that has erupted recently is called a(n) _____________ volcano. | active |
| A volcano that has not erupted in recorded history is called a(n) ____________ volcano. | extinct |
| Magma that has reached the earth's surface is called __________. | lava |
| Smaller fragments of molten rock that solidify almost instantly are called ______________. | lapilli |
| Holes or cracks which serve as escape vents for underground gases are called ______________. | fumaroles |
| A depression found at the top of a volcano is called a ______________. | caldera |
| Running along the edge of the Pacific Ocean, the ______ __ ______ is named for its many volcanoes. | Ring of Fire |
| Which type of volcano forms from large amounts of fluid lava building up gradually? | shield volcano |
| Which type of volcano forms from eruptions of mostly rock fragments (tephra) and a little lava? | cinder cone volcano |
| Which type of volcano forms from alternating layers of tephra and lava? | composite volcano |
| Describe the crust of the Earth. | The outermost layer, solid, made up of sediments |
| Describe the mantle of the Earth. | The middle layer, hotter than the crust, cooler than the core, plastic liquid |
| Describe the core of the Earth. | innermost layer, hottest layer, outer core is liquid, inner core is solid |
Created by:
misschapman
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