Chemmatter

3. - the protein contained in red blood cells that is responsible for delivery of oxygen to the tissues.
4. - a small, yellow bird that is well known for its singing.
6. - relating to or having the characteristics of a gas.
7. - a small thin, piece, or amount of something.
9. - small, dry sticks or other materials used to start a fire.
11. - catch fire or cause to catch fire.
12. - gather (a crop) as a harvest.
13. - a hole bored or drilled in the earth
16. complicated in structure; consisting of interconnected parts.
17. - revive (someone) from unconsciousness or apparent death.
18. - a strong desire to know or learn something.
19. - very large in size, quantity, or extent.

1. - sinking of the ground because of underground material movement
2. - a tall vertical structure of stone, wood, or metal, used as a support for a building.
4. - able to catch fire and burn easily.
5. - surround and have or hold within.
8. - covering a wide area in terms of space or scope; extensive or wide-ranging.
10. - being or occurring at the middle place, stage, or degree or between extremes.
14. - the process of burning slowly with smoke but no flame.
15. - coal of a hard variety that contains relatively pure carbon and burns with little flame and smoke.