Teacher Answer Key - California Academy of Sciences
... How are these fossils evidence of plate movement? Explain your reasoning. Answers will vary. Since mesosaurs are reptiles that couldn’t swim across an entire ocean, they must have lived when the two continents were one. South America and Africa then split due to plate movement, so we find different, ...
... How are these fossils evidence of plate movement? Explain your reasoning. Answers will vary. Since mesosaurs are reptiles that couldn’t swim across an entire ocean, they must have lived when the two continents were one. South America and Africa then split due to plate movement, so we find different, ...
8th grade Science Study Guide – Earthquakes
... Seismologists use a seismogram to determine when an earthquake started. The focus is the place within the Earth where an earthquake begins. The epicenter is the place on the Earth’s surface directly above an earthquake’s starting point. A seismograph is an instrument located at or near Earth ...
... Seismologists use a seismogram to determine when an earthquake started. The focus is the place within the Earth where an earthquake begins. The epicenter is the place on the Earth’s surface directly above an earthquake’s starting point. A seismograph is an instrument located at or near Earth ...
EARTHQUAKE SEASON: EXPLANATION OF A COMMON MYTH By
... Both these theories have since been disproved. Today, we know that the Earth’s outermost layer, the crust, moves due to tectonic forces – generally from the convection of the denser mantle below. This rigid and fractured crust is broken into large sections called tectonic plates, which are typicall ...
... Both these theories have since been disproved. Today, we know that the Earth’s outermost layer, the crust, moves due to tectonic forces – generally from the convection of the denser mantle below. This rigid and fractured crust is broken into large sections called tectonic plates, which are typicall ...
5 - PowerPoint - Earthquakes
... ~80% of all earthquakes occur in the circum-Pacific belt most of these result from convergent margin activity ~15% occur in the Mediterranean-Asiatic belt remaining 5% occur in the interiors of plates and on spreading ridge centers more than 150,000 quakes strong enough to be felt are record ...
... ~80% of all earthquakes occur in the circum-Pacific belt most of these result from convergent margin activity ~15% occur in the Mediterranean-Asiatic belt remaining 5% occur in the interiors of plates and on spreading ridge centers more than 150,000 quakes strong enough to be felt are record ...
What Causes EARTHQUAKES?
... earthquake describes the sudden slip on a fault and includes the ground shaking and radiating ___________________ that is caused by the slip. ____________________________, or other geologic processes, may cause stress changes in the earth that can also result in an earthquake. ______________________ ...
... earthquake describes the sudden slip on a fault and includes the ground shaking and radiating ___________________ that is caused by the slip. ____________________________, or other geologic processes, may cause stress changes in the earth that can also result in an earthquake. ______________________ ...
Earthquakes PowerPoint
... rupture - breakage and fracturing of the rock, causing an earthquake. ...
... rupture - breakage and fracturing of the rock, causing an earthquake. ...
Movers and Shakers
... a. Features of earthquakes including what they are, where they can occur, why they occur (the underlying mechanism), and how they are measured i. Know how the following terms apply to earthquakes: tectonic plates, epicenter, fault, foreshock, aftershock, seismograph and seismogram, P waves, S waves ...
... a. Features of earthquakes including what they are, where they can occur, why they occur (the underlying mechanism), and how they are measured i. Know how the following terms apply to earthquakes: tectonic plates, epicenter, fault, foreshock, aftershock, seismograph and seismogram, P waves, S waves ...
Earthquake Coverage for Midwestern Community Banks Along the
... and Missouri may be most exposed by the 150-mile long fault line. Last July, a study released by the U.S. Geological Survey showed that earthquake activity in the Midwest and East Coast quintupled between 2011 and 2013. About 100 were registered in that period, up from an average of 20 quakes a year ...
... and Missouri may be most exposed by the 150-mile long fault line. Last July, a study released by the U.S. Geological Survey showed that earthquake activity in the Midwest and East Coast quintupled between 2011 and 2013. About 100 were registered in that period, up from an average of 20 quakes a year ...
File
... using patterns of primary (P) and secondary (S) seismic wave arrivals – Clarification: The travel speed of seismic waves is strongly influenced by rock density, state of matter (liquid, solid) and pressure from depth. Changing density causes seismic energy to reflect and change direction incremental ...
... using patterns of primary (P) and secondary (S) seismic wave arrivals – Clarification: The travel speed of seismic waves is strongly influenced by rock density, state of matter (liquid, solid) and pressure from depth. Changing density causes seismic energy to reflect and change direction incremental ...
Activity 1 quiz File
... a) S-waves b) P-waves c) Surface waves 11) _____ Which type of seismic wave causes the most damage to buildings? a) S-waves b) P-waves c) Surface waves 12) _____ Which type of seismic wave can travel through both solid and liquid material? a) S-waves b) P-waves c) Surface waves 13) _____ The places ...
... a) S-waves b) P-waves c) Surface waves 11) _____ Which type of seismic wave causes the most damage to buildings? a) S-waves b) P-waves c) Surface waves 12) _____ Which type of seismic wave can travel through both solid and liquid material? a) S-waves b) P-waves c) Surface waves 13) _____ The places ...
Characteristics of Earthquakes Located In the Magadi Area, Kenya
... of the East African Rift system (EARS). Local seismic activity monitored previously around Lake Magadi revealed an earthquake cluster caused by swarm activity in the rift center at shallow depths, which was probably triggered by magma movements. The Magadi area is classified into three formations, n ...
... of the East African Rift system (EARS). Local seismic activity monitored previously around Lake Magadi revealed an earthquake cluster caused by swarm activity in the rift center at shallow depths, which was probably triggered by magma movements. The Magadi area is classified into three formations, n ...
Section 12.1
... • Although a plate may be moving as a single unit, its boundaries act like they were made of many small sections like the line of carts. ...
... • Although a plate may be moving as a single unit, its boundaries act like they were made of many small sections like the line of carts. ...
Plate Boundary chart key
... • Volcanoes • Volcanoes erupt Many DestructiveFaults earthquakes earthquakes destroy the crust and buildings that are in the area ...
... • Volcanoes • Volcanoes erupt Many DestructiveFaults earthquakes earthquakes destroy the crust and buildings that are in the area ...
What is an earthquake
... produced by the rapid release of energy • Energy released radiates in all directions from its source, the focus • Energy is in the form of waves • Sensitive instruments around the world record the event ...
... produced by the rapid release of energy • Energy released radiates in all directions from its source, the focus • Energy is in the form of waves • Sensitive instruments around the world record the event ...
Volcanic Eruptions and Hazards
... home to over 75% of the world's active and dormant volcanoes The Ring of Fire is a direct result of plate tectonics and the movement and collisions of crustal plates ...
... home to over 75% of the world's active and dormant volcanoes The Ring of Fire is a direct result of plate tectonics and the movement and collisions of crustal plates ...
Natural Hazards - Cal State LA
... • Addition of fluids increases pore pressure – Decreases friction between sediments trigger EQ ...
... • Addition of fluids increases pore pressure – Decreases friction between sediments trigger EQ ...
Earthquakes Seismic Waves Day 1
... To determine the location of an epicenter, scientists determine the difference between the arrival times of the P-wave and S- wave. The farther away an earthquake is, the greater the time between the arrival of the P-wave and the S-wave. By drawing at least three circles using data from different se ...
... To determine the location of an epicenter, scientists determine the difference between the arrival times of the P-wave and S- wave. The farther away an earthquake is, the greater the time between the arrival of the P-wave and the S-wave. By drawing at least three circles using data from different se ...
4.1 KEY CONCEPT SUMMARY Earthquakes occur along faults.
... Reverse faults form as rocks are pushed together. Strike-slip faults form as rocks are pushed horizontally in opposite directions. ...
... Reverse faults form as rocks are pushed together. Strike-slip faults form as rocks are pushed horizontally in opposite directions. ...
Chapter 5: Earthquakes
... a specific point. The focus of an earthquake is the point at which a rock beings to move, causing an earthquake. • An earthquake is the shaking and trembling that results form movement of rock beneath Earth’s surface. – Some can be unnoticed, some can cause the earth to break open, shift mountains a ...
... a specific point. The focus of an earthquake is the point at which a rock beings to move, causing an earthquake. • An earthquake is the shaking and trembling that results form movement of rock beneath Earth’s surface. – Some can be unnoticed, some can cause the earth to break open, shift mountains a ...
Earthquakes
... 1. What are the two factors that geologists take into account when they determine earthquake risk? 2. The risk of earthquakes is highest in the United States along the ___________ coast. 3. What kinds of damage are caused by the severe shaking of an earthquake? ...
... 1. What are the two factors that geologists take into account when they determine earthquake risk? 2. The risk of earthquakes is highest in the United States along the ___________ coast. 3. What kinds of damage are caused by the severe shaking of an earthquake? ...
Chapter 6 Review – Earthquakes
... If the statement is true, write true. If it is false, change the underlined word or words to make the statement true. 1. Liquefaction forces squeeze or pull the rock in Earth’s crust. 2. Rock uplifted by normal faults creates fault-block mountains. 3. An earthquake’s epicenter is located deep underg ...
... If the statement is true, write true. If it is false, change the underlined word or words to make the statement true. 1. Liquefaction forces squeeze or pull the rock in Earth’s crust. 2. Rock uplifted by normal faults creates fault-block mountains. 3. An earthquake’s epicenter is located deep underg ...
Earthquake
An earthquake (also known as a quake, tremor or temblor) is the perceptible shaking of the surface of the Earth, which can be violent enough to destroy major buildings and kill thousands of people. The severity of the shaking can range from barely felt to violent enough to toss people around. Earthquakes have destroyed whole cities. They result from the sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.Earthquakes are measured using observations from seismometers. The moment magnitude is the most common scale on which earthquakes larger than approximately 5 are reported for the entire globe. The more numerous earthquakes smaller than magnitude 5 reported by national seismological observatories are measured mostly on the local magnitude scale, also referred to as the Richter magnitude scale. These two scales are numerically similar over their range of validity. Magnitude 3 or lower earthquakes are mostly almost imperceptible or weak and magnitude 7 and over potentially cause serious damage over larger areas, depending on their depth. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. The most recent large earthquake of magnitude 9.0 or larger was a 9.0 magnitude earthquake in Japan in 2011 (as of March 2014), and it was the largest Japanese earthquake since records began. Intensity of shaking is measured on the modified Mercalli scale. The shallower an earthquake, the more damage to structures it causes, all else being equal.At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.In its most general sense, the word earthquake is used to describe any seismic event — whether natural or caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquake's point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter.