Earths Layers
What layer of Earth do we live on?
👉 Crust
At a divergent boundary, plates move…
👉 Apart
What causes tectonic plates to move?
👉 Convection currents
What supercontinent existed long ago?
👉 Pangaea
What natural event is common at transform boundaries?
👉 Earthquakes
Which layer contains convection currents?
👉 Mantle
At a convergent boundary, plates move…
👉 Toward each other
What happens to hot material in the mantle?
👉 It rises
Who proposed continental drift?
👉 Alfred Wegener
Where is the youngest ocean crust found?
👉 Near mid-ocean ridge
What is the center of the Earth called?
👉 Core
At a transform boundary, plates…
👉 Slide past each other
What happens to cool material in the mantle?
👉 It sinks
What type of evidence includes the same fossils on different continents?
👉 Fossil evidence
Where is the oldest ocean crust found?
👉 Farther from ridge
What state of matter is the outer core?
👉 Liquid
What type of boundary creates mountains?
👉 Convergent
What is the cycle of rising and sinking material called?
👉 Convection current
What does the shape of continents suggest?
👉 They were once connected
Why does subduction happen?
👉 One plate is denser and sinks under another
Why is the inner core solid even though it is very hot?
👉 Extreme pressure
What type of boundary creates new crust?
👉 Divergent
Explain how convection currents move plates.
👉 Heat causes material to rise and sink, creating movement that pushes plates
Name two types of evidence for continental drift.
👉 Fossils, mountains, rock layers
Explain how plate movement changes Earth’s surface.
👉 Creates mountains, volcanoes, earthquakes, new crust