4-Letter SCIENCE WORDS

(e.g., The smallest unit of living matter that can exist on its own. Answer: Cell.)

Freshman level

1. Fog that has become polluted with smoke.

2. The fourth planet from the sun.

3. A type of electric signage.

Graduate level

4. A common substance consisting mainly of sodium chloride (NaCl).

5. In science it is seen as a chemical opposite to an acid.

6. It is said to consist of a nucleus surrounded by electrons.

Ph.D. level

7. A unified body of matter with no specific shape.

8. A fine-grained mineral having a soft, soapy feel.

9. Its symbol is Pb.

Answers: 1. Smog. 2. Mars. 3. Neon. 4. Salt. 5. Base. 6. Atom. 7. Mass. 8. Talc. 9. Lead.

— North America Syndicate