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It is the outermost layer of the Earth.
crust
The thickest layer of the Earth.
mantle
What planet do we live on?
Earth
The innermost layer of the Earth that is made up of iron and nickel with small amounts of dense elements like gold, platinum, and uranium
inner core
pass or keep?
30 points
It refers to the massive disturbance that forms over tropical oceanic regions and usually creates dangerous conditions on Earth’s surface
typhoon
series of large waves
tsunami
A natural fast shaking of the lithosphere caused by release of energy stored in rocks.
earthquake
The origin from which the waves are emitted in all directions.
FOCUS
Point where waves are released
epicenter
The type of fault in which a block of fractured land slips downward from the fault plane.
normal fault
waves emitted from the focus
seismic waves
What does the Earth rotate around?
the Sun
large fractures where quakes occur
fault lines
open or close?
40 points
House foundation crumbled; electrical post fell
Intensity IX (Devastating)
Ceiling collapsed; things flying through the air
Intensity VIII (Very Destructive)
Glass sliding back and forth; felt movement but no damage
Intensity III (Weak)
Furniture moving; TV fell and broke
Intensity VI (Very Strong)
Chair rolling; pictures falling from shelves
Intensity V (Strong)
"I was sitting quietly reading a book when I thought I felt the chair move just a little. I wasn’t sure if it was an earthquake or just my imagination."
Intensity I – Scarcely Perceptible
"While lying in bed, I noticed my hanging lamp swaying gently. My brother beside me didn’t feel anything at all."
Intensity II – Slightly Felt
"I was having lunch with my family when the plates and glasses started to rattle. The hanging decorations were swinging slightly, and some of us stood up to check what was happening."
Intensity IV – Moderately Strong
"We were at school when the strong shaking threw us off balance. Cracks appeared on the classroom walls, and we had to rush outside as the ceiling tiles began to fall."
Intensity VII – Destructive
"Everything around us was destroyed. Concrete buildings collapsed, bridges broke apart, and the ground split open in several places. Nothing was left standing."
Intensity X – Completely Devastating