Across
- 3. Single-celled organisms without a nucleus
- 4. Tiny organisms that can cause disease like salmonella
- 6. The radiation leftover from the Big Bang
- 8. Organisms that eat the producers
- 9. An animal that hunts other animals for food
- 11. Any disease causing agent
- 12. A group of organisms that contain membrane-bound organelles
- 14. The stage just before a star begins its life in the main sequence
- 15. The force that attracts objects towards each other
- 17. A relationship where one species benefits and the other is unaffected
- 19. The event that started the universe
- 20. How bright a star appears in the night sky
- 22. A disease causing agent that is not living
- 24. A pattern of stars in the night sky
- 25. A tail like structure that allows cells to move around
- 27. Living things in an ecosystem
- 29. Non-living components of an ecosystem
Down
- 1. A community of living organisms and their environment
- 2. A massive explosion of a star
- 5. The actual brightness of a star at a distance of 10 parsecs
- 7. A relationship where both species benefit
- 10. Once a massive star stops fusing hydrogen, it begins fusing heavier elements
- 11. The process by which plants make food using sunlight
- 13. A inactivated or dead pathogen that is used to develop immunity to a disease.
- 16. Beneficial microbes found in the human gut
- 18. Hole A region of space with a gravitational pull so strong that nothing can escape
- 21. A relationship where one species benefits and the other is harmed
- 23. When two or more organisms fight for the same resources
- 26. A type of white blood cell in the second line of defence
- 28. A type of microorganism that includes yeasts and molds