Physical Science

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