Bio Stuff So Far...

5. Type of chemical bond formed when atoms share pairs of electrons.
6. An area of land that drains all rainfall and runoff into a common stream, river, or basin.
7. The vegetated transition zone along the banks of a river or stream that protects water quality.
9. Negatively charged subatomic particle that orbits the nucleus.
11. Water is known as the universal ______ because it dissolves many polar and ionic substances.
14. Feathery respiratory organs located under the carapace of a crayfish used for gas exchange.
16. Type of chemical bond formed by the complete transfer of electrons from one atom to another.
17. Long sensory appendages on the head of a crayfish used for detecting touch and chemicals in the water.
18. Positively charged subatomic particle found in the center of an atom.

1. Weak bond formed between the slightly positive hydrogen of one molecule and a slightly negative atom of another.
2. External openings of the reproductive tract in crayfish.
3. Electrons located in the outermost energy level of an atom, responsible for chemical bonding.
4. The attraction between water molecules and different surfaces (e.g., water clinging to plant xylem).
8. Rule stating that atoms tend to gain, lose, or share electrons to achieve a stable configuration of eight outer electrons.
10. The attraction between molecules of the same substance (e.g., water molecules sticking together).
12. dense central core of an atom containing protons and neutrons.
13. An atom or molecule that carries a net electric charge due to the loss or gain of electrons.
15. Atoms of the same element that have different numbers of neutrons.