Multiple choice 1
Where plates slide past each other, ______ occur.
Earthquakes
The name _____ means "all and"
Pangea
The youngest rocks in the ocean floor are located in the mid-ocean _____.
ridges
What part of Earth's structure is about 100 km thick.
The lithosphere
The _______ are forming where the Indo-Australian plates collide into the Eurasian plate.
Himalayas
The place between plates moving together are called ______.
convergent boundaries
The theory of ___________ was shown to be correct by age evidence and magnetic clues.
seafloor spreading
The results of plate movement can be seen at _____.
both b and d (Plate boundaries and rift boundaries)
What happens to warmer material in a convection current.
Warmer material rises to the surface.
The presence of the same _____ on several continents supports the idea of continental drift.
both a and b(Fossils and Rocks)
The seafloor spreading theory was proposed by _____.
Harry Hess
The plastic-like layer is the _______.
Seafloor spreading occurs because _____.
Hot, less-dense material below Earth's crust forced upward towards the surface.
How were the Andes mountain range, Himalayas, and the islands of Japan formed alike?
They were formed by convergent boundaries
______, occurring in the upper mantle, are thought to be the force behind plate tectonics.
Convection current
Studying the ocean floor, scientists found rocks showing magnetic ______.
Reversal
The rigid part of the plates of the ________ are made of oceanic crust or continental crust and upper mantle.
lithosphere
As Earth's plates move apart at some boundaries, they collide at others forming ______.
both c and d( mountains, volcanoes, and ocean basins)
Why are there few volcanoes in the Himalayas?
They are a result of crumpled plates, so no subduction zone.
Oceanic plates are pushed down into the upper mantle in ______.
subduction zone
Plates move apart at ______ boundaries.
Divergent
Earth's _______ move around on a special layer of the mantle.
Plates
Ocean floor rocks are ______ continental rocks.
Younger than
Why would the fossil of an ocean fish found on two different continents NOT be good evidence of continental drift?
Fish can swim.
The cycle of heating, rising, cooling, and sinking is called ______.
convection current