Science

1234567891011121314
Across
  1. 3. A negatively charged particle orbiting an atom's nucleus.
  2. 7. A tiny infectious agent that replicates inside cells.
  3. 8. An instrument for viewing distant objects in space.
  4. 9. The branch of science concerned with matter and energy.
  5. 10. A gas essential for human life.
  6. 12. A massive system of stars, dust, and gas held by gravity.
  7. 13. The study of Earth's structure and substances.
  8. 14. A substance consisting of only one type of atom.
Down
  1. 1. A group of similar organisms that can breed.
  2. 2. The variety of life in an ecosystem.
  3. 4. A tool used to see tiny objects.
  4. 5. A change in a DNA sequence.
  5. 6. A substance that provides immunity to disease.
  6. 11. The average weather conditions of a region.