Vocab
Sea-floor spreading occurs at:
Divergent boundaries
Which layer of Earth is the hottest?
inner core
The hypothesis that continents have slowly moved to their current locations is called
continental drift
Earthquakes are caused by:
moving tectonic plates
A transform boundary is where plates:
slide past each other
Movement caused by heating and cooling
convection
Which layer of Earth is the thinnest?
crust
The result of plate movement can be seen at
plate boundaries
The point inside Earth where an earthquake starts is called the:
focus
What is a fault?
a crack in earth's crust
The process that creates new ocean crust
sea-floor spreading
The soft, flowing layer beneath the lithosphere is
asthenosphere
What causes convection currents in the mantle
heat from Earth's core
The point on Earth’s surface directly above the focus is the:
Earthquakes are caused by?
moving tectonic plates
The sinking of one plate beneath another
subduction
The rigid outer layer of Earth
lithosphere
What evidence supports continental drift?
matching fossils on different continents
A crack in the earth's crust is known as a:
fault
An area where material from deep within Earth's mantle rises through the crust and melts to form magma _____ _______
hot spot
What forms at mid-ocean ridges?
new crust
This layer is solid iron and nickel, and is the hottest part of Eart
inner core
Alfred Wegener is known for:
The theory of continental drift
Where are volcanoes most likely to form?
plate boundaries
Powered by geothermal heat and erupts with steam and water
geyser