Across
- 2. Decay emission of energy in the form of ionizing radiation
- 6. rock that originated in outer space and has fallen to the surface of a planet or moon.
- 8. neutrino or antineutrino emitted during the decay
- 11. Dating calculates an age in years
- 12. mostly solid bulk of Earth's interior
- 13. Isotope the more stable form
- 15. Isotope The original unstable isotope
- 16. Boundary When two plates come together
- 18. Boundary formed where two tectonic plates pass laterally by one another
- 20. Core a hot, dense ball of (mostly) iron
Down
- 1. region of the upper atmosphere
- 3. rigid outer part of the earth
- 4. Current heat-driven cycles that occur in the air, ocean, and mantle
- 5. Core liquid, is about 1300 miles (2092 km) thick
- 7. Plates composed of the oceanic lithosphere
- 9. Crust outermost layer of Earth's lithosphere
- 10. Crust denser crustal layer of Earth
- 14. upper layer of the earth's mantle,
- 17. Boundary occurs when two tectonic plates move away from each other
- 19. Waves vibrations in the earth that transmit energy and occur during seismic activity such as earthquakes