Show:
Earthy-Earthquakes
Volley-canoes
Plate tectonics
Earth's layers
Vocabulary
100
These waves travel along Earth's surface like waves across an ocean or ripples across a pond.
What are surface waves or Lg waves?
100
Once magma reaches Earth's surface, it is called this.
What is lava?
100
This is the movement when tectonic plates divide or separate?
What is divergent?
100
The very central part of Earth that is divided into an inner part and an outer part.
What is the core?
100
A scientist who examines rocks to find out about Earth's history and structure.
What is a geologist?
200
A measure of the amount of energy released by an earthquake.
What is magnitude?
200
When a volcano's magma chamber is emptied and the volcano collapses inside itself, the hole that forms is called this.
What is a caldera?
200
This is the movement where tectonic plates collide or come together.
What is convergent?
200
A thick layer of solid and molten rock that lies around the core and is below the crust.
What is the mantle?
200
An instrument that detects and measures waves produced by an earthquake.
What is a seismometer?
300
The place where the slipping occurs in an earthquake.
What is the focus?
300
This is the name of the substance made of rocks and gases before it reaches Earth's surface and becomes lava.
What is magma?
300
When plates slide past one another, they are called this.
What are transform plates or boundaries?
300
A thin layer of solid rock that makes up the outermost part of Earth.
What is the crust?
300
Wegner's idea that the continents slowly moved to the positions they are in today became known as this.
What is the theory of continental drift?
400
A break or crack in the rock of Earth's crust and mantle along which movements take place.
What is a fault?
400
This is an outpouring of melted rock, ash, and gases out of a volcano.
What is an eruption?
400
A theory that scientists have developed to explain how forces deep within Earth can cause floors to spread and continents to move.
What is plate tectonics?
400
The layer of Earth that is made up of the crust and the upper mantle.
What is the lithosphere?
400
A physical structure on Earth's surface with specific characteristics.
What is a geological feature?
500
When waves reach Earth's surface, they spread out from this point directly above the focus of the earthquake.
What is the epicenter?
500
A volcano that is currently erupting or has recently erupted?
What is an active volcano?
500
A force that works like the blades of a pair of scissors to cause the rock to break along transform boundaries.
What is shearing?
500
All of Earth's liquid and solid water-including oceans, lakes, rivers, glaciers, and the water located underground.
What is the hydrosphere?
500
A theory scientists have developed to explain how forces deep within Earth can cause ocean floors to spread and continents to move.
What is plated tectonics?