Geology oceans

Total Flash Cards » 34
 
1. 

Earth is about

 

4.6 billion years old

 
2. 

In the scientific method it must be...

 

tested and verified by observations

 
3. 

T/F Humanity did not spread virtually to all inhabitable areas after the European Voyages of discovery in the late 1400's and early 1500's

 

False

 
4. 

Why did the Chinese abandon ocean explorations in 1433?

 

Political winds changed and the cost of the exercise was too great

 
5. 

This was the first man to publish a reasonably accurate map of oceans currents

 

Ben Franklin

 
6. 

Glomar Challenger is known mainly for ..

 

taking the first deep sea sediments

 
7. 

Earth is layered inside, different thickness and densities. How do geologists know this?

 

From observing transit times of waves through hte earth by earthquakes

 
8. 

The magnetic striping of the seafloor is considered evidence of seafloor spreading and...

 

periodic reversals int he polarity of the earth's magnetic field

 
9. 

an example of an object in buoyant equilibrium would be

 

Ice cube in water and plates on heavier material

 
10. 

A mystery in understanding plate tectonics has until recently thought to be...

 

None of the above. It's due to gravity

 
11. 

An early proponent of continental drift whose work was not well accepted was...

 

Alfred Wagner

 
12. 

Youngest seafloor rocks are found where?

 

near the rift valleys of the mid ocean ridge

 
13. 

Hydrothermal vents are located near where?

 

Active areas of seafloor spreading

 
14. 

Basaltic rock ...?

 

Comprises the actual seafloor

 
15. 

The first life forms on Earth arose more than ...

 

3.5 billion years ago

 
16. 

Challenger Expedition (James Cook) was what?

 

First 100% pure scientific oceanographic expedition

 
17. 

Earths spherical shape recognized by

 

Eratosthenes

 
18. 

When 2 oceanic plates collide what will happen?

 

a trench will form and large earthquakes will occur

 
19. 

The ocean originated from what?

 

Volcanic gores and radioactive heating of the earth interior, and the heating of the surface by meteorites

 
20. 

The earth is still hot on the inside because..?

 

of the decay of large radioactive elements that are allow the earths inner layers to heat

 
21. 

Most of the matter in the universe appears to consist of what?

 

Hydrogen gas

 
22. 

The first awareness of the spherical shape of the Earth developed in Europe around 1450 with the work of Henry and Navigator. T/F

 

False

 
23. 

The first person to develop a picture of the large scale wind and current systems of the earth was who?

 

Eratosthenes of Cyrene

 
24. 

Evidence suggests the universe began about 14 billion years ago in a ...

 

supernova

 
25. 

Which of the following statements does NOT describe subduction zones ?

 

they are sitting where lithospheric plates are diverging or pulling apart

 
26. 

The mid-ocean ridges are recognized as ...

 

divergent plate boundaries

 
27. 

The earth's oldest rocks are found ..?

 

At the cores of the continents

 
28. 

The word "oceanography" was first coined in association with...?

 

the challenger expedition

 
29. 

At which of these locations is the Earth's crust thickest?

 

Beneath Jasper, high in the Rocky Mountains

 
30. 

1st person to form picture wind and current systems of the earth was?

 

Matthew Maury

 
31. 

Wilson's Cycle describes what?

 

The birth and death of ocean basins

 
32. 

Evidence suggests the universe began about 14 billion years ago in a what?

 

Cataclysmic expansion of enery and matter

 
33. 

Lithospheric plates move how much per year?

 

3cm

 
34. 

The atmosphere was not as...

 

dense as it was before