Across
- 2. amount of mass in a given volume
- 3. harmful substances introduced into the eenvironment from human activities
- 4. celestial bodies that orbit a star, with a sphericl shape
- 5. grassland ecosystem found in North America
- 10. vast gravitationally bound system that consists of stars,stellar remmenants,etc
- 11. electrically charged atom that plays a role in chemical reactions
- 13. consists of sun,eight planets,ans their moons, dwarf planets, etc
- 15. the way water moves around the earth
- 17. subatomic particle with a positive charge
- 18. a community of living and non living organisms that interact with each other
- 22. subatomic particle with a negative charge
- 23. anything related to or living on earth
- 26. electrical potential energy per unit charge (V)
- 27. current flows through a path of resistance
- 28. a model that shows how different organisms in an ecosystem interact through their feeding relationships
Down
- 1. creates electric current in a conductor
- 6. measured in Ohms and represents the oppostion that an electrical component uses
- 7. a pure substance made with one atom
- 8. subatomic particle with no charge
- 9. property of matter that descibes the amount of electrical energy present
- 12. a graph of intensity of light emmitted by the star at different wavelengths
- 14. a natural satalite of the Earth
- 16. the rate at which something is transferred or converted, measured in watts
- 19. a closed loop of conductive material that allows electric current to run through
- 20. a massive luminous ball of plasma held together by gravity
- 21. buildup of electric charge on a materials surface
- 24. occurs when one celestial body passes in front of another, making a shadow and blocking views
- 25. large reions of Earth's surface that have similar climate, vegetation, and animal life