Moving Continents
They made the first world maps and noticed how some continents fit together like pieces of a puzzle (1500s)
Geographers
A theory that has been supported by evidence from experiments or observation is called this
hypothesis
mountains forming, volcanoes, and earthquakes
Heat from the earth's core does what to the mantle?
It melts the mantle
Name of all the continents together
Pangea
During the 1900's, scientists mapped the continents' edges and found more ________ that continents fit together
evidence
Number of sections the earth is broken into
about 20
Two plates colliding and pushing up layers of rock does what?
forms a mountain
What does some of the hot melted mantle do?
It rises toward the crust and cools
Direction in which the mantle moves
sideways
scientists developed this to explain the shape of the continents
hypothesis
Theory that explains how continents move
plate tectonics
When one plate is pushed under another plate and melted rock erupts on the earth's surface, what happens?
volcanoes are formed
What pushes the cooling mantle sideways?
move heat pushes the rising mantle
Why do scientists think the earth's crust moves?
Because it is spread out into about 20 plates
scientists believed that the continents were ______, but moved apart
connected
Large section of the earth's surface made of the crust and the rigid top part of the mantle
plate
Earth's plates ride or float to where
The top of the earth's core
Speed at which the continents moved apart
slow
most of the plates have these two types of crusts
ocean and continental
How does the mantle flow?
It flows like hot, thick soup, and the plates are carried upon it