1' Oceanic and continental crust differ in

1

• 1. Oceanic and continental crust differ in
• composition
• density
• thickness
• all of the above

2

• 2. In cross section, the plates are part of a
  rigid outer shell of the earth called
• lithosphere
• asthenosphere
• crust
• mantle

3

• 3. The San Andreas fault in California is a good
  example of which type of plate boundary
• divergent
• convergent
• transform

4

• 4. The Earth is about
• 6,000 years old
• 4.5 million years old
• 100 million years old
• 4.5 billion years old

5

• 5. A precursor to plate tectonic theory was
  proposed by A. Wegener in the early 1900s
• sea-floor spreading
• plate tectonics
• magnetic anomalies
• continental drift

6

• Which of the following data sets was used to
  confirm Hesss (1962) Sea-floor Spreading
  hypothesis?
• magnetic anomalies on the sea floor
• geometric fit of continents
• apparent polar wander paths
• similar fossils on different continents

7

• 7. A typical rate of plate motion is
• 3-4 meters per year
• 1-10 centimeters per year
• 1 kilometer per year
• 1,000 kilometers per year

8

• 8. In Hesss (1962) Sea-floor Spreading
  hypothesis, deep ocean trenches were sites where
• oceanic lithosphere was formed
• oceanic lithosphere was destroyed
• divergent plate boundaries existed
• the youngest oceanic crust existed

9

• 9. Plate tectonics is powered by
• internal heat in the mantle and core
• solar energy
• frictional heat at plate boundaries
• evaporation of sea water

10

• 10. The global distribution of earthquakes and
  volcanoes are
• randomly distributed across the planet
• focused at plate boundaries
• not well explained by plate tectonic theory