??? is the outermost layer of our planet and is less than 1% of the entire Earth's size.
??? is molten rock that has been extruded onto Earth's surface
??? can become a lot bigger if it will freeze.
??? are formed by sediment that is deposited over time, usually as layers at the bottom of lakes and oceans.
A volcano that can explode in any moment
The continents of the world seem to fit together like puzzle pieces!
A ??? is a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur.
A volcano that will never explode
??? are produced by all earthquakes.
??? is a layer of undisturbed rock usually located beneath a surface layer of soil or other material.
??? takes place when rocks are broken down without any change in the chemical nature of the rocks. The rocks are essentially torn apart by physical force, rather than by chemical breakdown.
??? is home to Canada, the United States, Mexico and Greenland.
??? is a type of limestone that forms when limestone is subjected to a lot of pressure over a long period of time.
??? are the slowest of the three waves.
??? are the simplest and most common type of volcano. They can develop as free-standing volcanoes, but can also grow around new vents on the slopes of existing shield volcanoes or stratovolcanoes.
??? is the second layer of the Earth.
??? form when existing rocks are exposed to heat and pressure deep within the Earth's surface.
??? are a side to side movements.
??? rain can also be produced from volcanic eruptions, burning coal and even rotting plant life.
??? involve the powerful movement of rocks in the Earth’s crust. The rapid release of energy creates seismic waves that travel through the earth.