The two most abundant elements in sea water are:

(A) Sodium and Potassium
(B) Sodium and Calcium
(C) Sodium and Chlorine
(D) Chlorine and Iodine

Q. The speed of sound in sea water is about:
(A) 15,00 m/s
(B) 16,00 m/s
(C) 17,00 m/s
(D) 18,00 m/s

Q. Sea water PH is limited to the range:
(A) 5.5 to 6.4
(B) 6.5 to 7.4
(C) 7.5 to 8.4
(D) 8.5 to 9.4

Answers:
1. (C) Sodium and Chlorine
2. (A) 15,00 m/s
3. (C) 7.5 to 8.4