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Science Test 10-16

This is the science test study thing

What is an earthquake? -The shaking and vibrating of the earth.
What causes most earthquakes? -Large and sudden releases of energy due to the shifting of tectonic plates.
What causes energy to be released from the earth? -The energy is released when movement occurs along large “cracks” in the earth’s outer layer.
What is a more uncommon cause of earthquakes? -About 5% of all earthquakes are related to volcanic activity
What is a seismologist? -A scientist who studies earthquakes.
Which way does the P-wave move? -Push/Pull (vertically)
Which way does the S-wave move? -Side to side(horizontally)
Which wave is faster? The P-wave or the S-wave? -P-waves move faster
Why do building collapse during an earthquake? -Because they are not built on solid ground
What is the process in which loose ground becomes liquid? -Liquefaction
What is a seismogram? - A seismogram is the paper that the vibrations are recorded on.
What is a seismograph? -A seismograph records the vibrations of the earth during an earthquake.
Why are dogs used to locate people in earthquakes? -They have a great sense of smell
What is the epicenter? -The point on the earth’s surface directly above the focus.
What is the focus -The point inside the earth where the earthquake occurs.
Why is there more damage done to buildings closer to the epicenter? -Waves lose strength as they drift away father from the epicenter
Why do earthquakes occur in some places more than others? -They occur where tectonic plates meet
What is the Richter Scale? -A scale used to measure the magnitude of earthquakes.
What is the Mercalli Scale? -A scale used to measure the intensity of an earthquake.
What is a tsunami? -A large wave(s) usually caused by an underwater earthquake.
What are the layers of the earth? -Crust, mantle, and the core.
What are the two types of crust? -Oceanic and continental
Which type of crust is thicker? -The continental crust.
Which type of crust is thicker? -The continental crust.
What is crust made up of? -Rock
What is the largest layer? -The mantle makes up most of the earth.
What is the top rigid layer of the mantle called? -The lithosphere. It is broken up into parts called tectonic plates.
What is the hottest part of the earth? The core
What is the core made up of? -Iron and nickel
What happens when two continental plates collide? -Mountains form
What happens when two oceanic plates collide? -Volcanic mountain ranges form.
What happens when plates slide? -No new landform is created
What happens when an oceanic plate and a continental plate collide? -A volcanic mountain range or an ocean trench
What happens when plates separate? -Mantle comes up to fill the parts with no plate. They start out as ridges. They eventually build up into mountains. Why do plates separate and
Why do plates separate and collide? -Because of convection currents in the mantle below.
Created by: Sanika



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