W.E.D.
The Grand Canyon was formed from this.
What is erosion?
These are formed when rocks get pushed up along a fault line and can form underwater.
What are mountains?
Due to deposition, this landform is created once enough underwater rock builds up to rise above the ocean surface.
What is an island?
Plateaus, valleys, canyons, and mountains are all examples of these.
What are landforms?
How many oceans are on Earth?
What is five?
This phenomenon causes mass movement and is the most powerful form of erosion.
What is gravity?
What is a seismic wave?
This is the land between hills/mountains.
What is a valley?
The Earth's crust and upper mantle are broken into very large pieces called these, and the largest one is the Pacific.
What are tectonic plates?
This is the type of water is found in the oceans on Earth, but not in the Great Lakes.
What is salt water?
These giant masses are able to carve long, deep grooves in solid rock!
What are glaciers?
This instrument is used to measure an earthquake.
What is a Seismometer?
Land (continents) moves on the surface of Earth due to these.
What are plate tectonics?
With the use of these, scientists can explore and observe the ocean floor.
What are underwater vehicles?
An Earthquake that occurs under an ocean can trigger one of these.
What is a tsunami?
These are carved out from water and waves eroding (and washing away) large rock along a shoreline.
What are arches?
These are smaller earthquakes that occur after a major earthquake.
What are aftershocks?
Earth's plates push together, pull part, and this.
What is to slide/rub against?
This the name given to people that explore the depths of the ocean.
What is an oceanographer?
This ocean feature is the largest underwater area between continents.
What is the ocean basin?
Dunes are deposits of sand caused by this phenomenon.
What is blowing sand?
Earthquakes occur along these.
What are fault lines?
This is the name given for the supercontinent that may have existed before continental drift broke apart large pieces of land.
What is a Pangaea?
Plates melt from under great heat and pressure and form this.
What is magma?
This is the deepest part of the ocean.
What is the Marianas Trench?