Across
- 3. a propagating dynamic disturbance
- 5. a portion of the electromagnetic radiation
- 6. the core of atoms and made up of protons
- 8. one of the four fundamental states of matter
Down
- 1. wood
- 2. the natural movement of air
- 3. an inorganic compound with the formula H₂O
- 4. a naturally occurring mixture of gaseous
- 5. radiant light and heat from the Sun
- 7. a black or brownish-black sedimentary rock