Across
- 1. the force between two surfaces that are sliding or trying to slide across each other
- 3. a celestial body in an elliptical orbit around a star.
- 4. the amount of matter a substance contains
- 8. a substance formed from two or more element any substance that cannot be decomposed into simpler substances
- 9. the force that attacks a body toward the center of the earth
- 10. a force of all the gas particles colliding
- 11. d=m/v
- 13. the basic unit of chemical element
- 15. the force acting on the object due to conductor a object that allows the flow of energy
- 16. center core of an atom
- 18. the collection of 8 planets and their moons in orbit around the sun
- 20. the speed of something in a given direction
- 21. orbital motion around an object
- 22. energy of an object at rest
- 24. the processes which heat or electricity id directly transmitted through a substance
- 25. the result of a negative and positive object
Down
- 2. energy contained within a system that is responsible for its temperature
- 5. energy of an object in motion
- 6. activity involving physical/mental effort
- 7. circular movement around a object around a center
- 12. a vehicle used for space travel
- 14. the gases surrounding the earth or another planets
- 17. a number placed in front of a chemical symbol
- 19. a group of atoms bonded together
- 23. an imaginary line going through the earth