volcanoes
earthquakes
shaping earth's surface
plate tectonics
mixed
100
what is lava?
magma out of the ground.
100
how many stations are needed to find the epicenter of an earthquake?
3
100
What is the depth of most earthquakes?
Usually 50 miles beneath the Earth's surface.
100
who is a geologist
a person who studies rockes
100
What is the inner core?
the inmost part of earth.
200
what is a volcano?
an opening in earth's crust.
200
how is an earthquake caused?
when layers of rock suddenly slip, releasing energy
200
how is acid-rain formed
it is formed when pollution gets into the air and mixes with rain.
200
how did fossils move so far?
by the plates moving.
200
what is a sandbar?
a sandy strip of land formed when sand is washed out and builds up to make a sandy strip of land
300
what is an island chain?
a line of volcanic mountains/islands
300
What is the epicenter of an earthquake?
the area directly above the focus
300
what is sediment?
little bits of rock in rivers.
300
how are shear mountains formed?
when plates rub against each other.
300
what is a meander?
a gentle curve/bend in a river with slow-moving water.
400
What is a hot spot?
a stationary pool of magma
400
3
how many stations are required to find the epicenter of an earthquake?
400
guess the word New Orleans has many ______.
levees
400
what is a fault?
a fault is a deep crack in the earth.
400
what is a cinder-cone volcano made of?
they are made of thick lava thrown high into the air that falls as chunks or cinders
500
guess the number around __ of earth's volcanic activity is on the ocean floor.
80%
500
what is a focus?
were the slipping ocurres
500
in which direction do sand-dunes point?
were-ever the wind is blowing
500
who thought up theory of continental drift?
Alfred Wegener
500
What is a relief map?
a map that uses shading/colors to show elevation.
M
e
n
u