This powerpoint presentation is for 9th grade honors Physical Science students. It covers vocabulary words from chapter 11 in the textbook.

1. Vocab
Chapter 11—Waves

2. • The greatest distance that particles in a medium move
from their normal position when a wave passes
Amplitude

3. • Any interference in which waves combine so the
resulting wave is bigger than the original wave
Constructive Interference

4. • The highest point of a transverse wave
Crest

5. • Wave caused by a disturbance in electric and magnetic
fields—DOES NOT require a medium (Ex: Light)
Electromagnetic Waves

6. • Any interference in which waves combine so the
resulting wave is smaller than the largest of the original
waves
Destructive Interference

7. • The bending of a wave as it passes an edge/opening
Diffraction

8. • An observed change in the frequency of a wave when the
source or observer is moving
Doppler Effect

9. • The number of vibrations that occur in a 1 second time
interval
Frequency

10. • The combination of 2+ waves that exist in the same place
at the same time
Interference

11. • Wave that causes the particles of the medium to vibrate
parallel to the wave’s direction.
Longitudinal Wave

12. • The matter through which a wave travels
Medium

13. • Waves that require a medium
Mechanical Wave

14. • The time required for one full wavelength to pass a
certain point
Period

15. • The bouncing back of a wave as it meets a
surface/boundary
Reflection

16. • The bending of a wave as it passes from one medium to
the other.
Refraction

17. • Wave form caused by interference that appears not to
move along the medium that shows some regions of no
vibration (nodes) and other regions of maximum
vibrations (antinodes)
Standing Wave

18. • Wave that causes the particles of the medium to vibrate
perpendicular to the direction the wave travels.
Transverse Wave

19. • The lowest part of a transverse wave
Trough

20. • A disturbance that carries energy through matter and
space
Wave

21. • The distance between ant 2 successive identical parts of a
wave.
Wavelength

22. • The speed at which a wave passes through a medium
Wave Speed