Across
- 1. The movement of elements like carbon, nitrogen, phosphorus, and water through living and non-living systems.
- 4. The continuous movement of water on, above, and below Earth’s surface.
- 5. The introduction of harmful substances into the environment, disrupting natural cycles.
- 7. The capacity to do work or cause change, flowing through ecosystems as sunlight and heat.
- 8. The breakdown of dead organisms, returning nutrients to the soil and atmosphere.
- 9. Using resources in a way that meets present needs without harming future generations.
- 11. The formation of new elements inside stars through nuclear reactions.
- 14. The movement of phosphorus through rocks, soil, water, and living things.
- 18. Anything that has mass and takes up space, recycled in ecosystems and created in stars.
- 19. The process in stars where lighter elements like hydrogen combine to form heavier ones, releasing energy.
- 20. Particles of elements created in stars that later become part of planets, life, and us.
Down
- 2. The process by which cells release energy by breaking down glucose and oxygen into carbon dioxide and water.
- 3. A powerful explosion of a massive star, scattering heavy elements into space.
- 6. The process by which nitrogen moves between the atmosphere, soil, and living organisms.
- 10. Energy-rich substances (coal, oil, natural gas) formed from ancient organisms, releasing carbon when burned.
- 12. The process plants use to convert sunlight, carbon dioxide, and water into glucose and oxygen.
- 13. The process by which carbon is exchanged among the atmosphere, living organisms, oceans, and rocks.
- 15. A group of interacting parts that work together as a whole.
- 16. Scientific information used to support explanations and solutions.
- 17. A repeated sequence of processes in which matter or energy is transferred.