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:
gamma
ray
penetrate
radioactive
decay
unstable
ion
frequency
ionising
ionisation
Geiger-Muller
tube
half-life
contamination
Score: 400
Wrong letter!
-5 points
Bonus!
+5 points
got that letter!
+5 points for them
Moving on to the next word...
G
e
i
g
e
r
-
M
u
l
l
e
r