Earth's Layers
This in the innermost part of the earth, probably made of solid metal. (2 words)
inner core
This is the name of the area in the Pacific Ocean where lots of earthquakes and volcanoes are.
Ring of Fire
A tsunami usually begins with what event?
earthquake or volcanic eruption
energy
Sound is made up of these.
waves or vibrations
The layer of the earth we're standing on.
crust
A crack in the earth's crust where rocks move. San Andreas is one example.
fault
When lava from a volcano cools and hardens, it forms this.
rock
How often a wave occurs during a particular amount of time.
frequency
The opening in the center of the eye that lets light in.
pupil
The thick layer of earth directly below the crust.
mantle
Melted rock beneath earth's surface.
magma
This tool measures the strength of an earthquake.
seismograph
This is the top part, or highest point, of a wave.
crest
When light bounces off an object, it is doing this.
reflecting
Liquid layer of the earth that is probably made of melted iron.
outer core
The type of boundary where one plate pushes under another, causing a volcano to form.
subduction
This natural event can travel across the ocean at the speed of an airplane.
tsunami
This is the strength of the vibrations, or the height of a wave.
amplitude
A structure or behavior that an organism has to help it survive.
adaptation
The earth's crust is thinnest below these.
oceans
Types of waves produced by an earthquake.
seismic or p-waves or s-waves
Volcano in Washington state that last erupted in May of 1980, spreading ash and rock for miles.
Mount St. Helens
The highness or lowness of a sound, determined by its frequency, is known as what.
pitch
Coding system that involves the use of TWO numbers: 0 and 1.
binary