Across
- 4. A gas commonly used inside light bulbs
- 5. A light metal used in some sports equipment
- 6. A shiny metal that helps protect steel from rust
- 7. A greenish-yellow gas often used to clean swimming pools
- 9. A metal used to make certain types of steel
Down
- 1. A soft metal that helps your muscles and nerves work
- 2. A metal often used to make strong steel
- 3. A strong, lightweight metal used in airplanes and bicycles
- 6. A mineral important for strong bones and teeth
- 8. A strong metal commonly used to make tools and buildings