The Origin of the Universe Crossword Puzzle

QUESTIONS LIST:

• big bang : event that serves as the foundation for the theory of our universe's origin (7)
• galaxies : they appear to be moving away from each other, supporting the big bang theory (8)
• hubble : astronomer whose observations contributed to the evidence for the big bang (6)
• forces : during the big bang, these were believed to have been unified into one (7)
• expansion : after the big bang, the universe continued to do this, but at a slower rate (9)
• inflation : hypothesized rapid expansion of the universe, explaining its uniformity (8)
• particles : they formed and settled into roughly the same temperature during the universe's early stage (8)
• plasma : name for the extremely hot, dense matter present in the universe's infancy (6)
• radiation : intensity was so high that matter-antimatter pairs could form and annihilate each other (10)
• hydrogen : most abundant element in the early universe, according to the big bang theory (8)
• helium : second most abundant element in the early universe, as predicted by the big bang theory (6)
• atoms : after recombination, these stable structures began to form in the universe (5)
• recombination : moment when the universe cooled enough for neutral atoms to form (12)
• microwave background : oldest radiation known, revealing insights into the universe's early moments (19)
• gravity : force thought to be repelled by dark energy, contributing to the universe's acceleration (7)
• dark matter : still-unknown material thought to outweigh visible matter in the universe (10)
• matter : what most of the universe's visible structures, including stars and galaxies, are made of (6)