Cave Crossword!

3. : A compound that reacts with materials by breaking it away.
5. : A formation that looks like a frozen waterfall. Smooth and chunky, these grow as water flows over surfaces in wide streams.
6. : Changing or adjusting to an environment.
7. : A calcium based mineral found in limestone. Cave formations are made out of this.
8. : A rare formation type that appears like a flat, round disc. Out of over 50,000 caves in the US, only 83 caves have shields!
10. STRAW : Small, hollow formations that become stalactites once big enough.
11. : The remains, traces, or impressions of long-dead animal or plant matter found in stone.
16. ACID : An acid, weaker than coffee, which is formed as water mixes with CO2 gas.
18. : A calcium-rich rock formed of sediment, usually shells and coral.

1. : A scientist who studies the very earth itself, particularly rocks, soil, and the deeper layers of the planet.
2. : A natural underground chamber large enough for air to be present. Often these have formations and wildlife in them.
4. : A long, thin formation formed as water streaks down walls and surfaces in long, thin streams, building outwards. These look like curtains hanging from above.
8. : A tall formation that comes from the ground with all its might.
9. : Material left behind, similar to soap suds left on a sink after washing hands.
12. : Material that settles at the bottom of a liquid.
13. : A limestone decoration found within caves.
14. : A long formation that hangs tight to the ceiling.
15. DIOXIDE (CO2) : A gas formed by plant decay.
17. : A large formation that grows as stalagmites from below meet with stalactites above and grows together, stretching from the floor to the ceiling.