Across
- 2. process that changes substances into new substances
- 4. substances that are formed during a chemical reaction
- 7. a combination of substances that can be physically separated from one another
- 8. the amount of space that an object occupies
- 9. energy of motion
- 13. two or more atoms joined together
- 16. subatomic particle with no electric charge
- 17. matter without any defined volume or shape
- 18. the transfer of heat energy through a solid
- 19. a pure substance that cannot be broken down into simpler substances by chemical reactions
- 20. rock that is created from previously existing rock by the action of intense heat and pressure
- 21. electron that resides in the outermost shell
- 24. matter with a defined volume but no defined shape
- 26. measure of the average kinetic energy of the atoms in a system, used to express thermal energy
- 28. energy in the form of heat
- 29. subatomic particle with a positive charge
- 30. the number of protons in the nucleus of an atom
- 31. measurements or observations
- 32. variable in an experiment that is a fair test; the variable that a scientist changes
- 34. The combined mass of all of the protons and neutrons of an atom
- 38. an observation that deals with characteristics that cannot be expressed in numbers
- 40. rock formed by gravity pressing fragments of other rocks and minerals together
- 41. the force of gravity on an object
- 42. energy in the form of heat
- 46. the substances present before a chemical reaction
- 48. variable that is affected when another factor, trait or condition is changed in a scientific experiment
- 50. rock that forms when melted rock cools and hardens
Down
- 1. change in matter that does not affect its chemical composition
- 3. plate boundary at which two tectonic plates move toward each other
- 5. the sinking of an oceanic plate beneath a plate of lesser density
- 6. the ability to do work or cause change
- 10. a pure substance that is formed when two or more different elements combine
- 11. a prediction based on background knowledge saying what is expected to happen in an experiment
- 12. the transfer of heat through a fluid
- 14. reaction that gives off heat energy
- 15. reaction that absorbs heat energy
- 22. observation that deals with a number or amount
- 23. in an experiment, a group that is kept under normal or ideal conditions while others are changed
- 25. an object's mass divided by its volume
- 27. material that has mass and takes up some amount of space
- 33. the amount of matter in an object
- 35. matter with a fixed volume and shape
- 36. plate boundary at which two tectonic plates move away from each other
- 37. energy that does not need matter to travel
- 39. an early sample, model, or release of a product built to test a concept or process.
- 43. plate boundary along which plates slide horizontally past one another
- 44. subatomic particle that has a negative charge
- 45. stored energy
- 47. the smallest unit of an element that has the properties of that element
- 49. a crack in a body of rock that the rock can move along