Layers are Fun
Based on the chart, on your study guide which property of the lithosphere best explains why it is divided into tectonic plates?
Its rigid and brittle structure
Two tectonic plates are moving horizontally past each other. Which type of boundary does this create, and what is a common geological feature or event associated with it?
Transform and earthquakes
Which hypothesis did Alfred Wegener develop to explain these patterns?
A. Evolution B. Plate Tectonics
C. Pangaea / Continental Drift D. Restless Continents
c
Most earthquakes and volcanoes happen along certain parts of the Earth. Based on plate tectonic theory, are the middle of continents or the edges most likely to experience these events, and why?
edges and it is where plates collide, pull apart, or slide past each other
A volcano erupts non-explosively. Which hazard is the most dangerous for nearby communities, and why is it more of a threat than volcanic bombs or pyroclastic flows in this type of eruption?
lava flow
Which layer directly enables the movement of tectonic plates by acting as a flexible surface beneath them?
Asthenosphere
Use the plate boundary image!
What type of boundary is occurring between the South American and African plates and does the boundary create new crust or destroy/recycle it?
divergent and create
Scientists observe molten rocks rising through cracks along a mid-ocean ridge. Over millions of years, this process adds new crust to the ocean floor and slowly pushes the continents apart. What process is occurring?
seafloor spreading
Earthquakes occur when stress builds up and are released along plate boundaries. Which boundaries can produce earthquakes, and why?
All!
Any place where gas, ash, or melted rock come out of the ground is known as a ____________.
volcano
A scientist discovers a newly modeled Earth layer that is solid, extremely rigid, and located deep below the mantle. Based on the chart, which conclusion is most reasonable?
The layer would play little role in plate movement
Use the plate boundary image!
What type of boundary is occurring between the Nazca Plate and the South American Plate and does this boundary create or destroy/recycle crust?
Convergent and destroy/recycle
What type of movement occurs within the asthenosphere/mantle that causes the movement of the tectonic plates?
Convection currents
What type of geological event immediately occurs when a fault or plate boundary suddenly shifts?
Earthquake
A volcanic island chain forms in the middle of the Pacific Plate, far from any plate boundaries. Scientists notice that volcanoes appear in a line and that older islands are farther from the currently active volcano. Which feature explains this volcanic activity?
Divergent Boundaries
Scientists cannot directly observe Earth’s interior, but they study seismic waves from earthquakes. Some waves travel through solids but not liquids. When certain waves stop at the outer core, what can scientists infer?
The outer core is liquid.
If a scientist could drill straight down through the Earth, which layer would they spend the most distance traveling through, and why?
Mantle...it's the thickest layer!
Name 3 pieces of evidence used to support continental drift?
fossils, continents shape, aquatic fossils on mountains, and glaciers
A town is located near a volcano known for explosive eruptions. Scientists warn that lava flows are slow and can often be avoided, but residents should be especially careful of fast-moving, deadly material ejected from the volcano. Which volcanic hazard poses the greatest immediate danger to people in this scenario?
Pyroclastic flow
Given that new crust is forming as tectonic plates move apart, which of the following is the most likely result over millions of years?
A. New mountains form as the plates collide and crumple.
B.The ocean floor spreads, creating a mid-ocean ridge.
B.The ocean floor spreads, creating a mid-ocean ridge.
Tectonic plates are made of different types of crust. Which statement best explains why tectonic plates can include both continental and oceanic regions?
A. Plates are made entirely of oceanic crust, which later turns into continental crust.
B. Plates can include both continental and oceanic crust because the lithosphere contains both types, allowing them to move together.
C. Plates are made of continental crust only, which floats on the mantle like icebergs.
D. Plates do not include any crust; they are made entirely of mantle material.
B. Plates can include both continental and oceanic crust because the lithosphere contains both types, allowing them to move together.
A massive wave travels across the ocean and floods coastal areas. Which event is the most common cause of this type of wave, and why does it generate such a powerful movement of water?
Earthquake – sudden movement of the seafloor displaces large volumes of water
A scientist is studying evidence for continental drift. She notes fossil similarities across continents, mountain ranges that align, and how continents seem to fit together. She also observes frequent earthquakes. Which observation does not support continental drift?
A. Mountain ranges lining up across continents
B. Similar plant and animal fossils found on distant continents
C. Continents fitting together like puzzle pieces
D. Earthquakes occurring along plate boundaries
D. Earthquakes occurring along plate boundaries
Why is the “Ring of Fire” the most seismically and volcanically active region in the world?
It is a zone where many tectonic plates meet, causing subduction, earthquakes, and volcanoes.
When two continental plates collide, what is the most likely outcome over millions of years?
A mountain could form