Vocabulary
Earth’s outermost layer of hard, solid rock that is underneath the soil, vegetation, and water.
What is the outer layer or crust?
Earth's outer layer is divided into sections called ____________.
What are plates?
Two plates move away from each other.
What is divergent?
TRUE OR FALSE?
Tectonic plates move about 3-17 inches a year.
FALSE
Tectonic plates move about 3-17 cm a year.
A diagram that shows what the inside of something looks like.
What is a cross section?
The plates of Earth's outer layer __________________.
What is move?
Two plates move toward each other.
What is 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.
An underwater mountain range formed when two plates move apart.
What is a mid-ocean ridge?
Earth's plates move on top of a soft, solid layer called the __________________.
What is the mantle?
The type of boundary that lies between South America and Africa.
What is divergent boundary?
True or False?
Convection currents inside the Earth cause the plates to move.
TRUE
Conventions currents cause the mantle to heat and move plates over millions of years.
A long, deep indentation in the ocean floor formed when two plates move together
What is a trench?
If you removed all the vegetation, soil, and water from the surface of the earth this would be left.
What is hard, solid rock?
Mid-ocean ridge, trench, and volcano.
What are some landforms are at plate boundaries?
True or False?
Continents slowly moved apart as new plates from underneath got added between them over millions of years.
TRUE
The soft, solid mantle fills the space.
An extinct reptile that lived about 300 million years ago.
What is Mesosaurus?
At divergent plate boundaries, rock rises from the mantle and _______, adding new solid rock to the edges of both plates.
What is hardens?
The type of current that is responsible for plate motion.
What is convection?
True or False?
If you drill deep underneath continents you will find hard, solid rock, and if you drill deep underneath the ocean you will find sand.
FALSE
There is hard, solid rock underneath both the continents and the ocean.