Plate Tectonics
What is a glacier?
any large mass of ice that moves slowly over land
What is the difference between a wave and a tsunami?
Waves are movement of water on the surface. Tsunamis are created from earthquakes and the whole ocean from the floor to the surface lifts up and creates an enormous wave!
What spheres do glaciers interact with?
When they move slowly over land they interact with the lithosphere.
What is weathering, erosion, and deposition?
Weathering is breaking off pieces of rocks.
Erosion is carrying these pieces away.
Deposition is depositing or putting down the pieces.
What three pieces of evidence support the continental drift hypothesis?
Land features line up across continents.
Fossils of the same plants and animals are found on different continents.
Continents used to have different climates.
What is the difference between an extinct, dormant, and active volcano?
Extinct = extremely low change of erupting
Dormant = Sleeping. Low change of erupting
Active = It's gonna blow!
How do glaciers change a landscape?
Weathering, Erosion (plucking and abrasion), deposition.
What is plucking and abrasion
Plucking is picking up rocks.
Abrasion is scraping them along the ground.
What are mid-ocean ridges?
Mid-ocean ridges are the spreading and creation of new ocean floor.
How does the silica content affect the magma?
Higher silica content creates thicker and stickier volcanoes, which creates explosive eruptions.
Lower silica content creates thin and runny magma, which causes quiet eruptions.
What is longshore drift?
Waves hit the beach at an angle, carrying sediments along with them
What is the difference between lava and magma.
Lava is magma that has come to the surface.
What is subduction?
Subduction is when the oceanic crust goes under continental or more oceanic crust
What do volcanologists measure to determine if a volcano will erupt?
Sulfur dioxide emissions, seismic waves, and tiltmeters to see if the volcano is filling up and gonna blow!
How are these landforms (sea arch • barrier island • sea stack • sandbar • sea cave) formed by waves.
Erosion = Sea arch, sea stack, sea cave
Deposition = Sandbar and Barrier island
Huge amounts of rock and soil that are gathered by a glacier and then deposited are called.
What is till?