7th grade exam review 2026

3. The state of matter through which sound waves travel the fastest.
6. The physical distance between two consecutive corresponding points on a wave.
9. An electrical circuit configuration that contains multiple pathways for current to flow.
11. A type of circuit with a break or gap that prevents current from flowing.
13. Stored energy based on an object's position, height, or condition.
16. The maximum height or displacement of a wave from its resting position.
18. To bounce back from a surface without being absorbed.
19. The movement of energy from one object, substance, or system to another.
21. Energy due to motion, which increases with speed or mass.
22. The matter or substance through which a mechanical wave must travel.
26. A device that converts mechanical energy into electrical energy.
27. To become smaller or less; what happens to kinetic energy as an object slows down.
28. The number of complete wave cycles that pass a given point per second.
29. The standard unit of frequency, representing cycles per second.

1. The unit used to measure electrical resistance.
2. Greater in position or value; an object placed further up a ramp has this kind of potential energy.
4. To bend a wave as it changes speed when passing from one medium to another.
5. To force or push away, as when two identical magnetic poles are brought together.
7. The standard scientific unit used to measure energy and work.
8. The unit used to measure electrical potential difference or voltage.
10. The unit used to measure electrical current.
12. A highly energetic electromagnetic wave with a very short wavelength and high frequency.
14. A temporary magnet created by passing electric current through a wire coil wrapped around a core.
15. To allow light or energy to pass completely through a material.
17. A device that converts electrical energy into mechanical energy.
20. The ability to do work or cause change.
22. The action or process of moving or changing position.
23. A space entirely devoid of matter, through which sound cannot travel.
24. The regions on a magnet where the magnetic force is strongest.
25. A wave where particles move perpendicular to the direction the wave travels.