Volcanoes Plates Earthquakes Flashcards
The major movement of the plates and description of plate boundaries of the Earth are
Convergent Divergent Transform
Tectonic plates float on the
Asthenosphere
Convergent movement of two plates often results in one plate pushing under another T F
True
There are areas of liquid rock under the middle of plates, resulting in volcanic activity and chains of islands T F
True
Scientists think continental plates move because of circulating liquid rock below the plates T F
True
What are the results of plate tectonics
Volcanic Activity Earthquakes Energy Sources for Man
The slabs of rock known as continents make up the complete lithosphere T F
False
The original land mass of the Earth before continents was called
Pangaea
The concept that Earth’s upper layer or lithosphere is divided into large quite rigid segments which float over the more dense upper mantle is termed
Plate Tectonics
Plate boundaries where two plates are moving apart from one another and new plate material is being formed as molten rock rises to fill the gap between them are called
Ridges
The plates of the Earth move because of
Convection currents in the mantle
The strongest shock waves of an earthquake occur close to what is called the epicenter a point on the surface of the crust directly above what is called the
Focus
An earthquakes magnitude is measured with a tool that records the size of seismic waves called a
Seismograph
Most earthquakes occur
Along plate boundaries
Earthquakes and volcanoes share which of the following in common
They both occur along plate boundaries They both can involve explosive movement They are both related to plate tectonic activity
Volcanoes can cause
Global Cooling Earthquakes and the Release of Poisonous Gases
Dust and ash from a volcanic eruption can be carried
10s 100s or even 1000s of miles
Scientists can predict volcanic eruptions
False
The tallest volcanoes are composite volcanoes
False
Hot lava of volcanoes can mix with water to create a
Steam Explosion
Many volcanoes are less than a half-mile tall T F
False
A volcanic explosion can create winds faster than those found in a hurricane can T F
True
Lava flows can never be stopped T F
False
The epicenter of the earthquake is directly below the focus T F
False
Waves move out through the ground from the source of an earthquake T F
True
Some of the results of an earthquake can be
Property Damage Landslide or a Tsunami
The machine that measures the strength of an earthquake is called
Seismograph
Earthquake foci are how deep
More than 200 Miles Deep 50 200 Miles Deep or can be 0 50 Miles Deep
Many earthquakes happen along the borders of
Tectonic Plates
Faults are only found near the edges of tectonic plates T F
False
Waves of large earthquakes can move through large portions of the Earth T F
True
Earthquakes can happen when the strain on weak rocks forces them to break and fracture T F
True
Earthquakes can happen when there is a large amount of
Volcanic Activity
All planets have the same structure inside T F
False
The surface of the Earth is constantly moving T F
True
The thickness of the atmosphere is equal to the radius of the Earth T F
False
Which of these terms is used to label the layers below the Earth’s surface
Mantle and Core
The Earth would be the same planet if we had a solid iron core instead of liquid T F
False
Which of these choices is NOT a type of rock Igneous Sedimentary Ingenious Metamorphic
Igneous
What happens when two tectonic plates push against each other
Earthquakes
What is a good way to find faults beneath the surface
Map Earthquakes
The epicenter of an earthquake is the source of the quake below the surface T F
False
Name 3 types of Lava
Silicic Mafic Intermediate
This volcano has runny lava and has non-explosive eruptions, has a low profile yet is very large
Shield volcano
This volcano is formed from pyro clastic material, and has violent eruptions with blocky lava. Has very steep sides and cause ash to travel very far
Strato-volcano or composite volcano
This volcano forms along vents. Know for being very short and very round and semi violent eruptions. But also erupt for a short time
Cinder cone
