Vocabulary
A sudden shaking of the earth's surface
What is an earthquake?
Earth's outer layer is divided into sections called ____________.
What are plates?
When two plates move away from each other
Divergent
True or False- At convergent plate boundaries new plate from underneath fills in the gap that was created by the plates moving apart.
False,
New edges of plate are added at divergent boundaries.
What dinosaur fossils were found in both South America and Africa?
Mesosaurus
The layer of soft, solid rock underneath the Earth's plates
What is the mantle?
This is a diagram that shows what the inside of something looks like
Cross Section
When two plates move toward each other
Convergent
True or False- Some continents are no longer touching because earthquakes and volcanoes pushed them apart.
False-
Continents are always moving slowly due to movement in the mantle.
What is the rate per year that the South American plate and the African plate are moving away from each other?
3cm per year
An underwater mountain range formed when two plates move apart.
What is a mid-ocean ridge?
This is evidence of life from the past, such as bones, footprints, or leaf prints
Fossils
Volcanoes and earthquakes occur at this type of boundary/boundaries
Both convergent and divergent boundaries
True or False- Plates are floating in massive oceans
FALSE-
Plates do NOT float. There is hard, solid rock that connects beneath the plates.
What country sits right on a plate boundary causing it to have many volcanoes?
Iceland
a long, deep indentation in the ocean floor formed when two plates move together
What is a trench?
If you removed all the water from the surface of the earth this would be left.
hard, solid rock?
In what boundary does Magma from the mantle comes up to fill the space, cools, and hardens - adding new solid rock to the edges of both plates.
Divergent Boundary
True or False- Continents slowly moved apart as new plates from underneath got added between them over millions of years.
FALSE-
The soft, solid mantle fills the space, NOT new plates.
What does GPS stand for?
Global Positioning System
The place where two plates meet.
What is a plate boundary?
Earth's plates are in ______________ motion.
Constant
In what boundary does one plate move underneath the other plate and disappear into the mantle.
Convergent Boundary
True or False- Underneath the soil, Earth’s outer layer is made of hard, solid rock. Underneath the ocean, Earth’s outer layer is made of sand.
False
Both the soil and ocean Earth's outer layer is made of hard, solid, rock?
What is the name of the scientist that came up with on the first theories that the continents were once connected?
Alfred Wegener