Show:
Earth's Layers
Plate Tectonics
Definitions
Changes to Earth
Pangaea
100
This layer of the earth is the thickest.
What is the core?
100
The surface of the earth is broken into about this many pieces.
What are twenty?
100
This is the layer of gases that surrounds the earth and contains clouds.
What is atmosphere?
100
This is what we call the process of breaking down and changing rocks.
What is weathering?
100
Name one piece of evidence to prove that all the continents used to be connected.
What are fossils, coal deposits, mountains, or glaciers?
200
This layer of the earth is the thinnest.
What is the crust?
200
This is a landform created by movement of plates, allowing lava to escape.
What is a volcano?
200
This is the water part of the earth's surface.
What is the hydrosphere?
200
These are the two types of weathering that can occur.
What are physical weathering and chemical weathering?
200
This is why scientists think that the supercontinent Pangaea split apart.
What is plate movement or continental drift?
300
This layer of the earth is in the middle.
What is the mantle?
300
This is a landform caused by plates colliding with one another.
What is a mountain?
300
This is the rigid outer shell of the earth that consists of the crust and upper mantle.
What is the lithosphere?
300
This is the main cause of erosion.
What is flowing or moving water?
300
These people gathered information in the 1500s that helped geographers map the earth.
Who are explorers?
400
This layer of the earth is made of iron and nickel.
What is the core?
400
This natural disaster is caused by plates rubbing across each other.
What is an earthquake?
400
This is the moving of weathered rock or soil.
What is erosion?
400
Name at least one cause of weathering.
What are wind, water, ice, chemicals (air or water pollution), and living things (tree roots, mosses)?
400
This is how many large, separate landforms now make up the continents.
What are six? (North America, South America, Eurasia, Africa, Australia, and Antarctica)
500
This layer of the earth is made completely of solid rock.
What is the crust?
500
True or false: all of the earth's plates have both a continental crust and an oceanic crust.
What is false? Some have only ocean crust.
500
This is the dropping of materials moved by erosion.
What is deposition?
500
Name one type of land that is created by deposition.
What are deltas, beaches, and sand dunes?
500
Scientists think that the continents started to break apart about this many years ago.
What is 180 - 200 billion years?