Continental Drift
The observation that the continents fit together like puzzle pieces
Continental Drift
Description of inner core
a solid ball of iron and nickel
Divergent Boundary
two tectonic plates move apart
Name 3 different plate boundaries
Divergent, Convergent, Transform
Scientists found that the continents were moving apart from each other due to magma rising out of mid-ocean ridges, and they called this
Seafloor Spreading
What evidence supported Alfred Wegener?
Matching fossils, rocks, plants, mountains on different continents
Description of Outer Core
a liquid layer of iron and nickel that lies between the mantle and the inner core
Convergent Boundary
two or more tectonic plates collide
How many minor plates are there?
10
How do the plates move in Divergent Boundary
two tectonic plates move apart
What countries are a part of Gondwanaland?
Present-day South America, Africa, Arabia, Madagascar, India, Australia, and Antarctica
Description of Crust
Thin rocky layer
Transform Boundary
a place where two tectonic plates slide past each other horizontally, creating a fault line.
Earthquakes occur, for example, along CONVERGENT margins, where plates are
Colliding
How do plates move in a Convergent boundary?
two or more tectonic plates collide
The Earth's continents were once connected in one giant continent called
Pangea
Describe the movement in convection currents
As the heated fluid rises, it is replaced by a cooler fluid
How many plates the Earth's crust is divided into?
7
Explain what convection currents are
As the heated fluid rises, it is replaced by a cooler fluid
How do plates move in a Transform Boundary
a place where two tectonic plates slide past each other horizontally, creating a fault line.
Scientists found that the continents were moving apart from each other due to magma rising out of mid-ocean ridges, and they called this
Sea floor spreading
The hot liquid found underneath the Earth's surface is called
Magma
Along which two plates do we see major earthquake activity?
Pacific Plate and North American Plate
Plate tectonics, or the movement of pieces of Earth's crust, is thought to be caused by
Convection currents in Earth's mantle
What landform is created by a transform boundary?
When two plates slide past each other, this can create fault lines. Earthquakes commonly occur at transform boundaries.