unit 4 module 2 lesson 1-2

What piece of evidence was Wegener missing during his lifetime to prove continental drift?

vast mountain ranges deep below the ocean's surface

Wegener did not find similar rocks on multiple continents. t/f?

Who observed that continents fit together like a puzzle?

an imaginary line on a map that shows points that have the same age

a process in which new oceanic crust continuously forms along mid-ocean ridges and is destroyed at ocean trenches

Similar fossils were never found on various continents. t/f?

Did people believe Wegener's theory of continental drift while he was alive?

rock under earth's surface is cold. t/f?

When did Wegener start to observe the fit of continents?

When did Wegener's ideas become widely accepted?

Volcanic rocks on different continents were identical in both ______ and ______

Sediments in South America, Africa, India and ______ were similar when piecing Pangaea together.

What was the name of the fossil plant found in South America, Africa, India, Australia and Antarctica?

Scientists used data from echo sounders to create _____________ of the seafloor.

What forms from compaction of ancient swamp plants that grow in warm, wet regions?

lava cools and hardens (condenses) to form new ______________

Beneath the sediment in some countries, Wegener found _______________

Wegener reasoned that mountain ranges separated when continents drifted apart. t/f?

Because magma is _________ dense it rises upward through cracks in earth.

Which of these is an example of a mid-ocean ridge?

scientists were able to map the ocean floor using a device called an

magma that erupts onto earth's surface

a deep, underwater trough created by one plate subducting under another plate at a convergent boundary

Wegener's hypothesis that all continents were connected in a single landmass that broke apart 200 mya and drifted apart

Glossopteris grew in polar (cold) continents. t/f?

states that the earth's surface is made of rigid slabs of rock called plates that move with respect to one another

The presence of coal beds in Anarctica indicates that the frozen land once had a ____________ climate.

When did Wegener die?

name given to a supercontinent that began to break apart about 200 million years ago

Rock samples allow scientists to determine the age of the seafloor and create __________ maps

molten rock beneath earth's surface

Wegener found that there were coal deposits in _________

Wegener thought that Antarctica had to be close to the equator at sometime in the past. t/f?

The Mariana Trench is the deepest landform on earth. t/f?

An echo sounder is a device that produces sound waves that travel from a ship to the seafloor and back. t/f?