Across
- 6. the quantity of matter in a physical body.
- 7. the material involved in the change is structurally the same before and after the change.
- 8. the ability to do work
- 9. is a pure substance consisting only of atoms that all have the same numbers of protons in their nuclei.
- 10. the resistance that one surface or object encounters when moving over another.
- 12. the smallest unit of matter.
- 16. a structure built across a river or stream to hold back water.
- 18. it is the technique used in the construction and testing of a scientific hypothesis.
- 24. incompressible fluid that conforms to the shape of its container but retains a constant volume independent of pressure.
- 28. the stored energy in any object or system.
- 30. are a type of subatomic particle with no charge.
- 31. a continuous path through which electricity travels.
- 34. the emission or transmission of energy in the form of waves or particles through space or through a material medium.
- 35. a property of matter by which it remains at rest or in motion in the same straight line unless acted upon by some external force.
- 36. lightest stable subatomic particle known.
- 37. one of the distinct forms in which matter can exist.
- 38. mass per unit volume.
- 39. the process of something moving or changing place or even just changing position.
Down
- 1. an atom that has more electrons than protons.
- 2. the study of the inorganic world.
- 3. a disturbance that moves energy from one place to another.
- 4. firm and stable in shape; not liquid or fluid
- 5. wave in which particles of the medium vibrate at right angles or perpendicular to the direction that the wave travels.
- 7. comprises branches so that the current divides and only part of it flows through any branch.
- 8. the study of the electromagnetic force.
- 11. any substance that has mass and takes up space by having volume.
- 13. a state of matter that has no fixed shape and no fixed volume.
- 14. is a form of energy that harnesses the power of water in motion.
- 15. are a type of subatomic particle with a positive charge.
- 17. that branch of science that deals with the structure of matter and how the fundamental constituents of the universe interact.
- 18. a brief statement or account of the main points of something.
- 19. when a substance combines with another to form a new substance.
- 20. the use of nuclear reactions to produce electricity.
- 21. the return of light or sound waves from a surface.
- 22. three laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it.
- 23. electromagnetic waves with wavelengths longer than those of terahertz (THz) wavelengths but relatively short for radio waves.
- 25. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 26. the basic building blocks of all living things.
- 27. is a thermal power station in which the heat source is a nuclear reactor.
- 29. table of chemical elements.
- 32. a form of energy that an object or a particle has by reason of its motion.
- 33. a proposed explanation for a phenomenon.