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Across 1. The solid, dense center of the Earth 3. The scientific theory that the universe began from a singular explosion 6. The liquid layer surrounding the inner core of the Earth 8. Rock that has changed form due to high heat and pressure 9. A small solar system body made of ice, dust, and rocky material 13. A naturally occurring solid substance with a specific chemical composition 15. The mass of an object per unit of volume 16. An object that produces a magnetic field 17. The theory that continents were once connected and have drifted apart over time

Down 2. The circular movement of fluid or air caused by heating and cooling 4. The galaxy that contains our solar system 5. Rock formed from layers of sediment compressed over time 7. The amount of space an object or substance occupies 10. The act of watching something carefully in order to gain information 11. The process by which a liquid turns into vapor 12. Rock formed from cooled and solidified magma or lava 13. A measure of the amount of matter in an object 14. A conclusion drawn from evidence or reasoning