Handout 19-2 Name________________________________________ Period___________

Chapter 19: Section 2: Directed Reading Pages 475-478

Section: Features of the Ocean Floor (page 475) ______ 1. The shallow sea floor between the shoreline and the deep-ocean bottom is

called the

a. continental margin. b. deep-ocean basin. c. continental crust. d. oceanic crust.

CONTINENTAL MARGINS (page 475) ______ 2. The part of the continent covered by water is called the

a. shoreline. b. continental margin. c. continental shelf. d. deep-ocean basin.

______ 3. The continental shelf is part of the

a. continental margin. b. deep-ocean basin. c. ocean surface. d. oceanic crust.

4. V-shaped valleys in the continental shelf and continental slope are called ___________.

5. What is one place submarine canyons are often found?

6. How can turbidity currents help form submarine canyons?

DEEP-OCEAN BASINS (page 476) 7. Where is the deepest place in Earth’s crust located?

8. How do trenches form in the deep-ocean basins?

9. The flattest regions on Earth are __________________________________________.

10. Layers of fine _____________________________________ cover the abyssal plains.

11. How does the age of the oceanic crust affect the thickness of sediments on the abyssal

plains?

12. The most prominent features of ocean basins are _____________________________.

13. What is one place where a mid-ocean ridge rises above sea level?

14. Where do seamounts form?

In the space provided, write the letter of the definition that best matches the term or phrase. _____ 15. guyot a. an area of increased volcanic activity where seamounts form

_____ 16. hot spot b. submerged seamount with a flat top

_____ 17. seamount c. a seamount that rises above the ocean

_____ 18. atoll d. an oceanic island that is in the process of being eroded into a

guyot

_____ 19. oceanic

island

e. submerged volcanic mountain taller than 1 km

Chapter 19: Section 3: Directed Reading Pages 479-482

Section: Ocean-Floor Sediments (479) 20. Name three ways sediments get into the ocean.

SOURCES OF DEEP OCEAN-BASIN SEDIMENTS (479) 21. What are two ways to take sediment samples in deep ocean basins?

22. How does volcanic dust become sediment in the deep-ocean basins?

Chapter 19 Section 2: Features of the Ocean Floor

1. Continental __________________________ are made up of the continental rise,

continental slope, and continental shelf.

2. The _____________________ place in Earth’s crust is a __________________________.

3. ____________________________ plate boundaries cause deep ocean _______________.

4. The _____________________ regions on Earth are _________________________ plains.

5. A ______________________ is made up of minerals.

6. The __________-______________________ ridges in Iceland are unusual because they

rise ________________________ sea level.

7. _______________________________ are most likely to form in _________ __________.

In addition to these notes study the diagram on the top of pages 476-477 so that you can

identify the different features found on the seafloor including the following:

continental shelf, continental slope, continental rise, trench, mid-ocean ridge, abyssal plain,

and seamount.