Across
- 1. an ancient supercontinent that joined almost all of Earth's landmasses into a single piece of land
- 4. an astronomical event that occurs when the Moon passes directly between Earth and the Sun, blocking all or part of the Sun's light from reaching Earth
- 6. a fast-moving, compressional seismic body wave that pushes and pulls the ground in the same direction the wave is traveling
- 9. a circular or nearly circular depression on the surface of the moon
- 12. large, dark, flat basaltic plains on Earth's Moon
- 13. long, narrow, bright streaks of pulverized rock and ejecta that radiate outward from impact craters on the Moon's surfac
- 15. a geological process where a denser tectonic plate dives beneath a more buoyant plate and sinks into the Earth's mantle at a convergent boundary
- 16. the biological process by which green plants, algae, and certain bacteria convert light energy into chemical energy
- 17. the mass of a rock, mineral, or soil divided by its volume
- 18. he natural, spontaneous breakdown of an unstable atomic nucleus into a more stable one by emitting radiation
- 20. The massive, hot layer of semi-solid rock in Earth located directly between the outer crust and the central core
- 22. a phenomenon in astronomy where a celestial body's rotational period on its axis matches its orbital period around a larger host body
- 23. an astronomical event that occurs when Earth moves directly between the Sun and the Moon, casting a shadow across the lunar surface during a full moon
- 25. the apparent curving or deflection of the path of objects, winds, and ocean currents moving across the Earth's surface caused by the planet's rotation
Down
- 2. the thin layer of gases surrounding a planet or celestial body, held in place by gravity
- 3. a long, narrow depression or trench on the surface of the Moon
- 5. a three-dimensional geometric shape that looks like a sphere but is flattened at the poles and bulges out around the equator
- 7. a wave of energy that travels through the Earth's interior or along its surface
- 8. bright, rugged, and heavily cratered regions that cover approximately 83% of the Moon's surface
- 10. a seismic body wave that travels through the interior of the Earth, moving ground particles up and down or side-to-side
- 11. the slow, circular movement of rock and fluid in Earth’s interior caused by differences in temperature
- 14. the scientific theory that Earth’s outer shell is divided into large, solid slabs of rock that slowly move
- 19. the natural process through which heat is trapped near Earth's surface by atmospheric gases
- 21. a natural, colorful light display in Earth's upper atmosphere caused by charged particles from the Sun colliding with atmospheric gases
- 24. geological process where tectonic forces pull apart Earth's lithosphere