Across
- 3. Which element is necessary for human breathing and makes up about 21% of the Earth's atmosphere?
- 4. What is the metal used in electrical wiring and pennies?
- 5. Which element is a precious metal used in jewelry and electronics?
- 6. Which element is used in neon signs and is a noble gas?
- 7. What is the metal used in steel production and is essential for human health?
- 8. What is the lightest and most abundant element in the universe?
Down
- 1. What is the precious metal used in jewelry and coins?
- 2. Which element is a noble gas and is used in balloons and airships?
- 4. What is the element that is the basis of all life on Earth and is found in diamonds and graphite?
- 6. Which element makes up about 78% of the Earth's atmosphere and is used in fertilizers?