Moderate difficulty suitable for most players
Elements and Forces of Natural Science
Moderate difficulty suitable for most players
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Across
- 1. Substance providing nourishment for growth
- 2. Fundamental particle inside protons and neutrons
- 5. To chemically combine with oxygen
- 7. Smallest unit of a chemical compound
- 8. Massive system of stars and interstellar matter
- 11. Microscopic agent causing infections
- 13. To emit energy in rays or waves
- 18. Nerve cell transmitting signals
- 19. Basic unit of a chemical element
Down
- 3. Dark volcanic rock common on Earth's crust
- 4. Electric potential difference, measured in volts
- 6. Close interaction between different species
- 9. Variants of an element with different neutron numbers
- 10. Force pulling objects toward each other
- 12. Relating to heat energy
- 14. Capacity to perform work or cause change
- 15. Reflected sound wave heard again
- 16. Preserved remains of ancient organisms
- 17. A celestial body orbiting a star
- 20. Plant carbohydrate used for energy storage