Earth Ch 2 Matter, Forces, and Energy

2. change from gas directly to a solid state.
6. the change from liquid state to vapor.
7. change from a solid to a gas.
8. anything that takes up space and has mass.
9. gives things weight
17. the phase that most pure substances can be in is determined by temperature
19. the amount of space matter occupies.
20. the attractive particles are no longer rigidly held in place but can move somewhat.
22. changes that occur in a material without changing the identity of the material.
23. change of state or phase from a gas to a liquid.
24. force acting on an object as it moves through a distance.
27. when an atoms emits protons, it changes to another element.
28. type of vaporization that occurs at a temperature below the boiling point.
30. pure substance that cannot be broken down into a simpler substance by ordinary chemical means.
31. refers to the gravitational pull on an object by another larger object.
32. charged atoms.

1. also known as the law of conservation of mass energy.
3. the ability to do work.
4. when liquid particles have enough velocity to escape their partners.
5. a push or pull that occur in pairs – contact or field.
10. consists of only one type of matter.
11. distinct groups of atoms bonded together.
12. material that can be separated into two or more pure substances by physical changes.
13. changes in the identity of a material changes that result in a different material with a different composition and properties.
14. particles have relatively little kinetic energy compared to the attractive forces that are present between molecules.
15. substance as it enters the liquid state.
16. the average kinetic energy of the molecules of a substance.
18. energetic ions and a seething cloud of electrons.
21. the amount of matter in an object.
25. vaporization happens so fast that the liquid forms bubbles that rise through the liquid.
26. substance as it enters the solid state.
29. the basic particles that make up elements.