Plate Boundaries (Identify the Action)
Seafloor & Magnetism
Evidence & Fossils
Volcanoes & Hot Spots
Geologic History (Superposition)
100
This boundary occurs where two plates move toward each other and can create mountains.
Convergent Boundary
100
In the process of seafloor spreading, where is the newest rock always found?
At the center (near the ridge)
100
How do fossils of the same land animal ending up on different continents support Plate Tectonics?
It shows the continents were once joined together.
100
These form in the ocean or on land when magma escapes through the crust, and the plate moves over it to create a chain.
Hot Spots
100
In a sequence of undisturbed rock layers, where is the oldest layer found?
At the bottom
200
This boundary occurs where two plates slide past each other, often causing earthquakes like those in California.
Transform Boundary
200
As new rock forms at a ridge and ages, in which direction does it move?
Toward the edges (away from the center)
200
True or False: Similar fossils found on various modern continents provide evidence that the plates have moved over time.
True
200
Most volcanoes form along which two types of plate boundaries?
Convergent and Divergent
200
If a fault line cuts through several layers of rock, is the fault older or younger than the layers?
Younger
300
This boundary occurs where plates move away from each other, creating mid-ocean ridges.
Divergent Boundary
300
Earth’s magnetic field occasionally flips; what do we call the magnetism that matches Earth's current field?
Normal Magnetism
300
Name two organisms found on South America, Africa, and India.
Glossopteris and Lystrosaurus
300
A supervolcano eruption can cause the ground to collapse into a giant hole called a what?
Caldera
300
If magma pushes into existing rock layers and hardens, what type of rock is formed?
Igneous (Intrusion)
400
One plate sinking beneath another. What is this specific process called?
Subduction
400
The "striped" pattern on the ocean floor is evidence of seafloor spreading and what other event?
Magnetic Reversals (Magnetic Polarity)
400
Why would finding a fossil of a tropical plant in Antarctica be evidence of plate movement?
It proves Antarctica was once in a warmer location.
400
The "Ring of Fire" is a circle of volcanoes around the Pacific Ocean caused by what specific process?
Subduction (Convergent Boundaries)
400
What is the "Law of Superposition"?
Oldest rocks are on the bottom; youngest are on the top.
500
1: Transform, 2: Divergent, 3: Convergent
500
If you find two bands of rock on opposite sides of a ridge that are the same distance from the center, what else do they share?
The same age and magnetic polarity
500
Besides fossils, name one other "puzzle piece" piece of evidence for Continental Drift.
Shape of continents (fit like a puzzle) OR matching rock/mountain layers.
500
Describe the difference between a volcano at a boundary and a volcano at a hot spot.
Boundary: Caused by plate interaction. Hot Spot: Magma plume in the middle of a plate.
500
If you see a rock layer that has been folded or tilted, did the folding happen before or after the layers were deposited?
After