Earth Through Time

123456789101112131415161718192021
Across
  1. 2. The force exerted by a sinking tectonic plate into the mantle
  2. 6. Earth's outermost solid layer
  3. 7. The mass of a substance per unit volume
  4. 8. The innermost layer of Earth
  5. 10. The study of Earth's landscapes, environments, and the relationships between places
  6. 11. A space rock that enters Earth's atmosphere, often producing a bright streak
  7. 13. A large, rigid piece of Earth's lithosphere that moves over the mantle
  8. 14. The preserved remains or traces of ancient life forms
  9. 16. The capacity to do work or produce change
  10. 18. The layer of Earth beneath the crust, made of semi-solid rock
  11. 19. The study of volcanoes and volcanic activity
  12. 21. A method used to determine the age of materials using radioactive isotopes
Down
  1. 1. The study of Earth's magnetic field recorded in rocks
  2. 3. Anything that has mass and takes up space
  3. 4. A well-substantiated explanation based on evidence and observations
  4. 5. The movement of material due to differences in temperature and density
  5. 6. A large landmass on Earth's surface
  6. 9. The Sun and all celestial bodies bound to it by gravity
  7. 12. The study of earthquakes and the propagation of seismic waves
  8. 15. The science that studies Earth's physical structure and substances
  9. 17. The force generated by rising magma at mid-ocean ridges, pushing plates apart
  10. 20. The science of determining the age of rocks, fossils, and sediments