Summer Spelling

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Click on the beach balls in the correct order to spell the words in the list.

The game will count down from 400 seconds.
You will lose 5 seconds for each incorrect letter.

Words:
transverse
wave
longitudinal
ripple
compression
rarefaction
amplitude
displacement
wavelength
frequency
Hertz
wave
speed
period
Score: 400
Wrong letter!
-5 points
Bonus!
+5 points
got that letter!
+5 points for them
Moving on to the next word...
H
e
r
t
z