Physical Science

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1. change, when a substance combines with another to form a new substance.
4. firm and stable in shape; not liquid or fluid
7. electromagnetic waves with wavelengths longer than those of terahertz (THz) wavelengths, but relatively short for radio waves.
8. the resistance that one surface or object encounters when moving over another.
9. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
10. science, the study of the inorganic world.
12. plant, is a thermal power station in which the heat source is a nuclear reactor.
16. waves, wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels.
18. change, the material involved in the change is structurally the same before and after the change.
20. energy, the stored energy in any object or system.
22. the study of the electromagnetic force.
24. the process of something moving or changing place, or even just changing position.
28. the ability to do work
30. a proposed explanation for a phenomenon.
33. of matter, one of the distinct forms in which matter can exist.
34. the quantity of matter in a physical body. waves, a disturbance that moves energy from one place to another.
35. a brief statement or account of the main points of something.
36. the emission or transmission of energy in the form of waves or particles through space or through a material medium.

2. is a form of energy that harnesses the power of water in motion.
3. an atom that has more electrons than protons.
5. energy, a form of energy that an object or a particle has by reason of its motion.
6. circuit, comprises branches so that the current divides and only part of it flows through any branch.
11. 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.
13. the return of light or sound waves from a surface.
14. incompressible fluid that conforms to the shape of its container but retains a constant volume independent of pressure.
15. a structure built across a river or stream to hold back water.
17. laws, three laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it.
19. a continuous path through which electricity travels.
21. the basic building blocks of all living things.
23. energy, the use of nuclear reactions to produce electricity.
25. any substance that has mass and takes up space by having volume.
26. mass per unit volume.
27. that branch of science that deals with the structure of matter and how the fundamental constituents of the universe interact.
29. a state of matter that has no fixed shape and no fixed volume.
31. method, it is the technique used in the construction and testing of a scientific hypothesis.
32. the smallest unit of matter.