Volcanos And Earthquakes Flashcards
What is the main cause of earthquakes?
The main cause of earthquakes is the movement of tectonic plates.
True or False: Volcanos are always found at the edges of tectonic plates.
False
Fill in the blank: The boundary where two tectonic plates move apart is called a _______.
divergent boundary
What scale is commonly used to measure the magnitude of earthquakes?
The Richter scale.
Multiple choice: Which type of plate boundary is associated with the formation of mountains? A) Divergent B) Convergent C) Transform
B) Convergent
What is the point on the Earth’s surface directly above the focus of an earthquake called?
The epicenter.
True or False: All volcanos erupt explosively.
False
Fill in the blank: The molten rock beneath the Earth’s surface is called _______.
magma
What type of tectonic plate boundary is characterized by plates sliding past each other?
Transform boundary.
What is the phenomenon called when the ground shakes due to seismic waves?
An earthquake.
True or False: The Pacific Ring of Fire is known for its high volcanic activity.
True
asthenosphere
What is the term for the area where an earthquake originates?
Focus or hypocenter.
True or False: Earthquakes can only occur in tectonically active regions.
False
Fill in the blank: The _______ scale measures the intensity of an earthquake’s shaking.
Vei
Multiple choice: Which type of plate boundary often leads to earthquakes? A) Convergent B) Divergent C) Transform D) All of the above
D) All of the above
What is the term for volcanic ash, gas, and rock fragments expelled during an eruption?y
Pyroclast
True or False: The Earth’s crust is the thickest layer of the Earth.
False
Fill in the blank: The _______ is a tectonic plate located beneath the Pacific Ocean.
Pacific Plate
What is the main difference between a shield volcano and a stratovolcano?
Shield volcanoes have gentle slopes and are primarily made of basalt, while stratovolcanoes have steeper slopes and are made of alternating layers of lava and ash.
Multiple choice: Which tectonic plate is known to be one of the largest? A) North American Plate B) African Plate C) Eurasian Plate D) All of the above
D) All of the above
What is the geological process that leads to the creation of new oceanic crust?
Seafloor spreading.
