Movements of Ocean Water
EXERCISES
1. Multiple choice questions.
(i) Upward and downward movement of ocean water is known as the :
(a) tide (c) wave
(b) current (d) none of the above
Answer:
(ii) Spring tides are caused :
(a) As result of the moon and the sun pulling the earth gravitationally in the same direction.
(b) As result of the moon and the sun pulling the earth gravitationally in the opposite direction.
(c) Indention in the coast line.
(d) None of the above.
Answer:
(iii) The distance between the earth and the moon is minimum when the moon is in :
(a) Aphelion (c) Perihelion
(b) Perigee (d) Apogee
Answer:
(iv) The earth reaches its perihelion in:
(a) October (c) July
(b) September (d) January
Answer:
2. Answer the following questions in about 30 words.
(i) What are waves?
Answer:
(ii) Where do waves in the ocean get their energy from?
Answer:
(iii) What are tides?
Answer:
(iv) How are tides caused?
Answer:
(v) How are tides related to navigation?
Answer
3. Answer the following questions in about 150 words.
(i) How do currents affect the temperature? How does it affect the temperature of coastal areas in the N. W. Europe?
Answer:
(ii) What are the causes of currents?
Answer: