Across
- 3. — an element that glows in the dark and is essential for dna and atp energy molecules
- 4. — a reactive green gas first used to disinfect water and kill harmful bacteria
- 6. — an element that never rusts and whose atoms were formed in ancient supernova explosions
- 7. — a metal that helps create earth’s magnetic field and is the core of hemoglobin in blood
- 9. — the main material used in computer chips and one of the most abundant elements in earth’s crust
- 11. — a light strong metal that is highly recyclable with most of it still in use today
- 12. — makes up about seventy eight percent of earth’s atmosphere and is essential for building proteins
- 15. — a lightweight metal that burns with an intense white flame used in flares and fireworks
Down
- 1. — a reddish metal that conducts electricity extremely well and turns green when oxidized
- 2. — a soft metal that reacts explosively with water and is essential for nerve impulses
- 5. — the most abundant element in the universe and the fuel for nuclear fusion inside stars
- 8. — a gas so light it escapes earth’s gravity and drifts into space forever
- 10. — a yellow element found near volcanoes and used to make sulfuric acid
- 13. — a highly reactive gas that supports combustion and is required for cellular respiration
- 14. — forms millions of compounds and is the backbone of all organic life