HISTORY OF THE UNIVERSE EXPLAINED

4. the lightest and most abundant chemical element in the universe
6. the spectacular explosion of a star at the end of its life, releasing vast amounts of energy and light that can briefly outshine an entire galaxy
10. a nonmetallic chemical element that forms the basis of all known life on Earth, existing in various forms like diamond, graphite, and charcoal
13. Celestial bodies that emit light
15. interaction that occurs between particles with electric charge via electromagnetic fields
16. a lustrous, silvery-white, hard, and ductile metal known for its excellent corrosion resistance and magnetic properties
17. the fundamental ability to do work or cause change
18. a fundamental pure substance made of only one type of atom, defined by its unique number of protons

1. The force that attracts objects
2. an essential mineral for the human body, primarily known for its role in producing hemoglobin to carry oxygen from the lungs throughout the body and myoglobin to supply oxygen to muscles
3. Complicated or made of many parts
5. To increase in size
6. our Sun and the eight planets—Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune—along with dwarf planets, moons, asteroids, comets, and other space objects, all held together by the Sun's gravity
7. the sum total of all space, time, matter, and energy, encompassing everything that exists
8. a naturally occurring, reddish-orange, malleable, and ductile metallic element known for its high electrical and thermal conductivity
9. Theory of the origin of the universe
11. a stable subatomic particle
12. the most basic unit of a chemical element, consisting of a central nucleus
14. a chemical element; it has symbol He and atomic number 2
18. Our home planet
19. burst or shatter violently and noisily as a result of rapid combustion
20. a subatomic particle that is found in all atoms