Download Science 8

Science 8
Study Guide
Chapter 7
Name _______________________________________ Date _____________
A. Match each of the following with the correct definition or description.
____1. The crust and upper mantle make up this layer of the earth A. Continental Drift
____2. The place where plates move together
B. Pangaea
____3. This is the name for the place where one plate is forced
under another.
C. Convergent
Boundary
____4. Alfred Wegener believed that these were all once joined
together.
D. Mid-Ocean Ridge
____5. This name comes from two words that mean, “all land.”
E. Asthenosphere
____6. An underwater mountain chain
F. Subduction Zone
____7. The Earth’s thick, plastic like layer
G. Lithosphere
____8. The main points of evidence for this are fossils, rocks,
and climate.
H. Continents
B. Choose the best answer to complete each section.
____1. At what rate do scientists say the Earth’s plates move?
a. 1cm to 12 cm a century
b. 1cm to 12 cm a decade
c. 1cm to 12 cm a year
____2. Why does seafloor spreading occur?
a. Because earthquakes break apart the ocean floor
b. Because molten material beneath the Earth’s crust rises to the surface
c. Because new material is being added to the Asthenosphere
____3. What is the hypothesis called that says the continents have slowly moved to their
current locations?
a. Continental slope b. Continental drift c. Magnetic reversal
____4. What do plates of the lithosphere float on?
a. The crust b. The core c. The Asthenosphere
____5. Where are the youngest rocks on the ocean floor located?
a. At mid-ocean ridges
b. Near Asia
c. Near continents
____6. The presence of the same ______________on several continents supports the
hypotheses of continental drift.
a. Fossils
b. Rocks
c. Both a and b
____7. What is the name of a place where plates move apart?
a. Stable boundaries b. Transform boundaries
c. Divergent boundaries
____8. Before the continental drift, what was the name given by scientists for the single
super continent?
a. Glomar
b. Pangaea c. Wegener
____9. What mountains were formed by the collision of the Indo-Australian Plate and
the Eurasian Plate?
a. Appalachian
b. Rocky
c. Himalayan
____10. The matching of ________ on different continents are evidence of continental
drift.
a. Weather patterns b. Wind systems
c. Rock structures
____11. What forms where two oceanic plates collide?
a. A subduction zone b. A hot spot c. A rift valley
____12. Which of the following is an example of a transform boundary?
a. The Appalachian Mountains b. The Mid-Atlantic Ridge c. The San Andreas Fault
____13. What type of currents might drive plate motion?
a. Vertical
b. Convection
c. Horizontal
____14. What are formed when two continental plates collide?
a. Mountain ranges b. Strike-slip faults c. Rift valleys
____15. What is the Great Rift Valley in Africa an example of?
a. A Transform boundary b. A convergent boundary c. A divergent boundary
C. Write a description of the following.
1. Describe how a mid-ocean ridge is made.