Science grade 6 - Plate Tectonics

Card Set Information

Science grade 6 - Plate Tectonics
2013-12-02 21:04:50
gpv 6th grade science

earth's surface
Show Answers:

  1. What two types of evidence have geologists used to learn about Earth's interior?
    DE and ID
    • Direct evidence (rock samples)
    • Indirect evidence (seismic waves)
  2. When earthquakes occur they produce ______     _____. (2 words)
    seismic waves
  3. What are the three layers of the EArth?
    • Crust
    • Mantle
    • Core
  4. What is PRESSURE?
    results from a force pressing on an area
  5. True or False:
    The crust is a layer of solid rock that includes both dry land and the ocean floor.
  6. What is BASALT?
    dark rock with a fine texture
  7. ______ is a rock that usually is a light color and has a coarse texture.
  8. What is the MANTLE?
    A layer of hot rock
  9. True or False:
    Scientists divide the mantle up into layers based on the physical characteristics of those layers.
  10. What is a LITHOSPHERE?
    the uppermost part of the mantle, it's crust
  11. The soft layer below the Lithosphere is the ______.
  12. True or False?
    The CORE consists of two parts - a liquid outer core and a liquid inner core.
    • FALSE
    • The inner core is SOLID
  13. What are the three types of heat transfer?
    • Radiation
    • Conduction
    • Convection
  14. The transfer of energy through space is called _______.
  15. Heat transfer within a material or between materials that touch is called _____
  16. _______ is heat transfer by the movement of currents within a fluid.
  17. What measures how much mass there is in a volume of a substance?
  18. What is convention current?
    the flow that transfers heat within a fluid
  19. True or False:
    Heat from the core and the mantle itself causes convection currents in the mantle.
  20. Who's hypothesis said that the continents were once joined together?
    (sort of like our last name)
  21. What is a FOSSIL?
    any trace of an ancient organism that has been preserved in rock
  22. _____-______ ______ wind beneath the Earth's oceans
    mid-ocean ridges
  23. The device that bounces sound waves off underwater objects and then records the echoes of these sound waves is called _____.
  24. What is it called when the ocean floors move like conveyor belts, carrying the continents along with them.  (3 words)
    sea-floor spreading
  25. HOw does new oceanic crust form?
    Sea-floor spreading
  26. Name three types of evidence that support Hess's theory of sea-floor spreading?
    • evidence from molten material
    • evidence from magnetic stripes
    • evidence from drilling samples
  27. Deep under water canyons are called ____.
    deep-ocean trenches
  28. The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle is called ______.  This takes 10's of millions of years.
  29. Why is the Pacific Ocean shrinking?
    Subduction through the many trenches that ring the ocean is occurring faster than the new crust can be added.
  30. The lithosphere is broken into separate sections called ____.
  31. A well-tested concept that explains a wide range of observations is called ____ theory.
  32. The theory of ____ ____ explains the formation, movement, and subduction of Earth's plates.
    plate tectonics
  33. Breaks in Earth's crust where rocks have slipped past each other is called a _____.
  34. The place where two plates move apart, or diverge is called _____ _____.
    Divergent boundary
  35. What kind of valley forms along the divergent boundary?
    RIFT Valley
  36. The place where two plates come together or converge is called a _____ boundary.
  37. The place where two plates slip past each other, moving in opposite directions is called a _____ boundary.