Types of Waves: Page 29
QUESTION: What are the two types of waves?
OBJECTIVE: Students will be able to define and draw the two types of waves.
VOCABULARY: Transverse wave crest troughlongitudinal wave compression rarefaction
WavesWrite these questions onto page 29
DO NOT SKIP ANY LINES BETWEEN THE QUESTION
1. What is a transverse wave?2. What is a crest?3. What is a trough?4. What is a longitudinal wave?5. What is a compression?6. What is a rarefaction?
What is a transverse wave?A transverse wave is a wave that moves the medium at right angles to the direction of the wave.
What are the parts of a transverse wave?There are two parts to a transverse wave, the crest and the trough.
Draw and label the sketch below.
The grey line is the rest position. You can think of this as the water in a calm lake.
crest
trough
Rest position
The red line is the transverse wave. The high part is the crest and the low part is the trough.
What is a longitudinal wave?A longitudinal wave is a wave that moves the medium in the same direction of the wave.
What are the parts of a longitudinal wave?
There are two parts to a longitudinal wave, the compression and the rarefaction.
Draw and label the sketch below.
The compression is where the slinky is squeezed together. The rarefaction is where the slinky is stretched out.
compression
rarefaction
Waves: Review page 29Check that the answers to these
questions are in your notes.
1. What is a transverse wave?2. What is a crest?3. What is a trough?4. What is a longitudinal wave?5. What is a compression?6. What is a rarefaction?
VOCABULARYTransverse wave-the medium moves at right angles to the direction of
the wave
Crest- the high part of a transverse wave.
Trough-the low part of a transverse wave.
Longitudinal wave-the medium moves in the same direction as the wave.
Compression-the part of a longitudinal wave where the medium is close together.
Rarefaction-the part of a longitudinal wave where the medium is far apart.