Across
- 2. The range of frequencies of electromagnetic radiation, which contains microwaves.
- 4. The second element in the periodic table and the second element ever made. Also, it is the main gas used to fill balloons.
- 6. The first element to ever form, also is the first element in the periodic table.
- 7. Planet and star clusters
- 8. The creation of the universe
- 10. The subatomic particle that was responsible for the the creation of the universe
Down
- 1. Where all matter is located
- 3. The background noise of the big bang
- 5. The third planet from the Sun, which has the perfect conditions for life
- 9. The center of the solar system,