Dark Matter & Dark Energy Vocab Crossword

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Across
  1. 1. A mysterious force that permeates all of space and acts as a "repulsive gravity," causing the expansion of the universe to speed up.
  2. 5. The fundamental force of attraction that pulls objects with mass toward one another.
  3. 7. Another term for the universe, often used when emphasizing it as a complex and orderly system.
  4. 9. A theoretical end-of-the-universe scenario where gravity eventually halts expansion and collapses everything back into a singularity.
  5. 10. A theoretical end-of-the-universe scenario where expansion continues forever, causing the universe to become too cold and diluted to sustain life or heat.
Down
  1. 2. The continuous stretching of space itself, which increases the distance between distant galaxies over time.
  2. 3. An invisible form of matter that does not emit or reflect light but exerts a massive gravitational pull on galaxies.
  3. 4. Significant scientific questions that remain unsolved, such as the true identity of dark matter and dark energy.
  4. 6. The entirety of all space, time, matter, and energy that exists.
  5. 8. A theoretical end-of-the-universe scenario where the acceleration of expansion becomes so violent that it eventually tears atoms and space-time apart.